Awesome! It reminded me of Geometry Dash in a good way!

Fun game, one small suggestion is to make the gun have some sort of cooldown or autofire mode (hold to shoot) because the game is a lot easier if you can click a lot faster which seems a bit unfair. I do love the simple art style and music though!

I really likes the saturated colors and how they contrast from the black background as well as the smooth lighting.

The sound effects of the enemies getting hit and the particle effects that come off of them makes them so satisfying to kill. I also like how the particles match the enemies, it makes it look like you're blasting chunks off of them.

I also liked how the game had different enemies to fight, though I was kind of hoping they would have more specialized attacks rather than having more health or shooting slightly faster. Perhaps you could have the enemies carry different weapon times, such as a shotgun that shoots a spread of bullets, a sniper whose bullet velocity is lightning fast, or a melee enemy that constantly runs towards you with a spiked bat.

I felt like the jumping wasn't that responsive whenever the cube was on a ramp or when the cube was standing on its corner. If the cube's rotation was meant to be a movement style choice, then perhaps a raycast boxcast that doesn't rotate can be used to determine if the box is grounded or not.

The jumping also felt kind of floaty, which made it frustrating to dodge bullets since my character would be stuck floating in the air while an undodgeable projectile would come towards me. I would suggest looking at the video, Better Jumping in Unity With Four Lines of Code. It really helped me understand how jumping in classic platformer games (such as Super Mario Bros) is satisfying and how to easily design the mechanic in Unity.

The rewind feature feels more of a secondary feature rather than the main ability of the game. Perhaps if there were more areas that required the rewind feature then it would feel much more useful. However, even if it's more of a secondary ability, it's still a REALLY cool effect watching everything travel backwards in time.

Cool game! This is the first non-puzzle game I've played on this game jam. If you want, then rate my game.

It was a fun game. Ireally enjoyed the aesthetics of your game, very simple but yet glowy and smooth. I did not use the rewind as much as i would like in game. But it was great. 

(Please rate mine :D) 

Fun game, I liked the simple art style. I will say, with the player having such a high move and jump speed and the enemies having so much health, I feel like the player is incentivised to just run past the enemies. I had a lot of fun with it though

The graphics are nicely done despite being simple, and the music and sound effects fit the game quite neatly. I agree with NilaCk regarding the floaty jump and bullet speed, and prehaps some screenshake in places could help the game feel if not overdone. 

I also felt that the rewind wasn't that useful. You said in an earlier comment that you didn't want to force it on people, but I feel thats not the correct approach. If a mechanic doesn't add to the game, it generally shouldn't be there in the first place. Thats not a hard and fast rule, but designing a core mechanic that people don't need to use is a little self defeating. I'd suggest reworking the mechanic a bit to tie it more into the gameplay and encourage its use.

But those bits aside, the game has a very fun base and is impressive for your first game. With some tweaking this could really be an excellent shooter.

I'll get straight to ppotential improvements, the distortion Post-Processing is a bit over-done, the jump is very floaty, the rotation of the cube is a good addition but it doesn't fit in, one enemy can shoot me even if I can't see him, this is extremely annoying, another addition to the game could be moving enemies, it really adds, the performance needs a bit of work, and finally, the bullet speed is a bit low, and I guess that's it! Otherwise, the game is great, great graphics, good audio and yeah! But only if you mentioned the brackeys healthbar sprite in the credits of sprites for the submission questions, amazing submission overall!
Edit: I played multiple levels without using the rewind mechanic, it really isn't a big deal in the game

Good game play. Bump up the graphics on a more polished game and some more levels and you got yourself a great game.

Fun levels, I like the arena fights at the end of the levels. I enjoyed the rewind effect doing a negative of everything, but I couldn't see any times where rewind was advantageous. Also I feel like I recognize that health bar from somewhere ;)

Liked the gameplay. Graphics are good too. Only thing is that the rewind function seems fairly useless most of the time.

Haha, fun game, really enjoyed the action and the controls felt fun. I loved the polish of the game and the feedback it gave me when i rewound or hit an enemy. The audio was really good too.

The game was suuper fun to play, and caught me by surprise cause I didn't really expect it when it started. The flow of the level was really nice and the action packed run and gun aspect of it was lovely. I liked the rotation of the square and it's 'floatiness' a lot. To be honest I felt like there is no need for rewinding. Also I had no idea how to open or how did I open the blue "door" things, sometimes it just happened, and sometimes I felt stuck, maybe I'm just dumb.
With some tweeks, the game could be really good, keep up the good work!

The controls were smooth and it was funny how the square still rotated. Nice shooting effect and particle effects. Aiming the gun while running and jumping felt action packed.good job  Please check out my game if you haven't :D

Cool game, had a lot of fun jumping around and shooting but I wish the rewind function had a more important aspect.

Super fun game!!! Really enjoyed it :D

I played on window mode, and sometimes I accidentaly clicked outside the window and when pressing the TAB or Space the screen scrolled down and had to scroll back up to return to the game screen. That costed me a couple of lives XD. Would be nice to have the option to use other buttons.

But still, it was a fantastic game. Congrats!!

Awesome game! I think you should have done something better with that rewind though, idk. The third level is really hard, took me a while to pass it. But anyway, fun shooter, great graphics and juice! :D

My opinion about your game is that I never really feel the need to rewind time. There are some collision problems as well. A bit more focus on level design could improve even more your game. But hey, it was fun to play, non the less. 

If you have some spare time, check my puzzle game. The main mechanic is time rewind of your bomb, but enemies react to your bomb is different ways. There are 12 levels and you can do they in any order you like.  I'd appreciate any rating  https://itch.io/jam/brackeys-4/rate/721302

This was a really good game and i really enjoyed playing it. The difficultywas moderate but it would be better if you implemented the rewind mechanic more in the game. Apart from that, great game.