Overall a nice game. It's a classic concept, that is well executed with an interesting twist of quickly changing between the different arenas.

I will divide my feedback into several sections. Don't take it too harshly, it's just a bunch of stuff I noted during my time with the game that I think could be improved or made better, I really had fun with your game, otherwise I would not be writing this extensive feedback:

Gameplay:

• Nice camera movements, good job on that.
• The feel of the game was nice, although the powerups sometimes felt a bit unrewarding (does the shield really shield me?).
• I also did not notice there are even some power ups for my first couple of playthroughs.
• The power-ups were a bit elusive to pick. I would increase its hitbox a little bit, it felt really bad to miss it by a tiny hair and then be thrown to a different dice face.
• Nice touch with the shifting spawning points, it made the gameplay more interesting and chaotic.
• The game usually ended for me with a small fast enemy spawning next to me and killing me before I could react. It would be nice to have the enemies for example slowly build-up speed after spawning or have some FX warning the player that they will spawn soon.
• I like the high score and overall menu layout with all those "start game", "try again" etc. options.

Graphics:

•  The color palette seems a bit basic and without much meaning apart from blue good - red bad. I think it could use a bit more tweaking to create a more cohesive experience. Perhaps look up some color palette generator and take inspiration from that? On the other hand, I appreciate that the colors were not obnoxious and annoying, which is especially hard to achieve when only using basic 3D shapes with no textures.
• You are using the default Unity skybox and unfortunately, the skybox is very visible in your game. There are many awesome free skyboxes on the asset store that you can use. This would improve the "graphics" a lot for very minimal effort. Or if you really don't want to use any external assets, put the whole thing into some kind of a box yourself.
• I guess you are using URP? The default settings in URP do not use any antialiasing and it is very visible in your game. Turn AA on and it will instantly look much better. Turn on bloom for extra juice points.
• I like the particle FX for shooting and especially destroying enemies. Good job on that!
• The enemies all look very much alike, the only differentiator is the size, but it's hard to distinguish that with peripheral vision and thus it is very hard to differentiate enemies that are further away from the player, especially when there's a swarm of them. It would be nice to have some kind of obvious visual differentiator.
• It is totally OK to use basic shapes (it gives the game interesting abstract feel of "kill the red bad"), but even with basic shapes you can do a lot of cool flashy animation stuff. You can squish them and stretch them, make them bounce and so on. If the shape of the enemy did some kind of visual feedback on the hit for example (apart from the color change), it would add quite some juice to the game.

Sounds:

• I like that you created your own music for the game, but frankly, it feels a bit disturbing after a while. It feels like both the synth and drums are trying to play main melody as well as set the rythm. It would in my opinion work much better if the drums set the rythm (and played repetitive rythm section all over). This would allow the main synth instrument to vary the pacing a bit and play an interesting melody theme.
• I like the SFX throughout the game, but...
• The shooting sound could be a bit more 8-bit to fit the game and less realgunlike.
• The machinegun powerup changes the gun sound but then it somewhat stops working properly.
  • The previous shooting SFX is audible when jumping but not otherwise.
• There is little SFX feedback from the enemies apart from dying. You could add for example:
  • Hit SFX
  • Proximity to certain dangerous enemies (like the fast ones)
  • Spawning of enemies (especially the boss-like large ones)

Miscelaneous:

• Windows build v2 does not work, I got stuck on falling intro.
• Sometimes the game was a bit choppy. I blame WebGL, but this kind of game genre begs for some optimization in form of pooling the enemies for example.
• Entering the settings for the first time mutes all sounds.

Once again, a good job on making what looks like a fairly finished game, keep it up!

great intro sequence, the dice side transitions are amazing as well. I did find a pretty successful strategy of just hugging the walls. the sparseness of the environment made the game kind of abstract in a good way, there was nothing to do but shoot at the swarm and collect powerups. overall seems like a completed game

Nice game ! The visuals are pretty basic but works well. Though having some animated models would go a long way to make it more engaging. The color palette is ok and make it all looks pretty coherent.

Loved the dice rotation animation ! It's very trippy :)

In terms of gameplay, I pretty much agree with what has been said bellow and don't see much to add to that so I'll jut highlight some of them that seemed the most important for me.

A timer to indicate when the dice will rotate & maybe a way to impact it (lower or higher it if you kill a certain number of ennemies)

A higher fire rate on the default gun to keep up with the spawn rate. maybe lower the spawn rate a bit on the high value dice faces to avoid being overwhelmed too fast. And maybe a dash/dodge to get you out of tight situations ?

I encountered a small bug on the web version. when starting the game in full screen it seem to loop on something and the scene doesnt start I managed to go around that bug by leaving full screen and putting it bck when the fight start.

All in all It's a neat jam entry. The screenshake and particle effects definetly add some juice to it. good job :) 

Looks way better than what I played in the jam, but it is now difficult to see enemies after hitting them once (when they turn black), especially on darker sides of the die. Not sure how you have the lighting set up, but it may be caused by the direction/intensity of the lights on some faces.

Enemy spawn rate vs gun fire rate feels unbalanced, maybe tone down the rates on the sides with more pips or just increase the base fire rates. Love the powerups, I just think the basic weapon needs better juice.

I'd like more player involvement in the dice rolling, as is it feels very random. I don't think it needs to be entirely player controlled but maybe if it were more tied to killing enemies, or at least had an on screen timer of some sort to let you know when it will rotate.

Got a high score of 3459. The graphical improvements to the game do make it feel better, especially the lighting and particle effects on enemy death. It also seems like in the original, the enemies spawn so fast and overwhelm you, especially with your measly pea shooter, so it feels more like you're just running and dodging the enemies than fighting them, while in v2 you're being a little more active. I still do think you feel pretty weak even in v2.

I like the addition of the ground pound move, and the way the die turns is perhaps the coolest part about the game, so then it's neat how you slam down after that. I was confused at the shield move at first, thinking I could take a hit; but it's just an orbiter. Really I think the shield should be slightly more powerful, being able to take more than 1 or 2 hits, but with it slowly decreasing in power over time, because otherwise it doesn't feel that meaningful of an upgrade.

But really the biggest thing you could do to give the game more polish is to have the characters and enemies not be cylinders and prisms. Or at least make them stylized, idk. That's probably difficult obvs, I'm not a 3d artist, nor do I have any idea what the character models should look like, but it's def the kind of thing that helps first impressions, which are pretty important.

I think sound doesn't work on the web version.