What worked:

I like the switching mechanic. Having two separate worlds that you have to interact with to progress works well. The concept of a rougelite being slower or having more puzzle elements than action is an interesting idea to pursue.  The art looks cool, and I like the main character. Being able to choose when to fight the boss at any level (once you have enough resources) is a cool idea, letting the player decide when they want to take a swing at it. I never got stuck in any walls either which is usually a problem in world switching games during jams, so great job there!

What didn't:

The art for the traps is a bit unclear. After running into it, I of course realize it'll kill me, but it's still a bit hard to tell/see at a glance due to how thin it is.

I didn't realize I could interact with barrels and chests at first. Maybe more direction is needed?

I might have missed something, but I never found a way to deal with the bats. I entered the boss arena once before immediately being swarmed with bats. Is there an attack? Maybe after fully upgrading light?

I didn't really see a point to having the world switching based on a timer, aside from no traps being in the light world. There aren't really many benefits to being in either world (aside from some barrels and chests) throughout the main portion of the game, so I would rapidly flick between the two if I needed to smash a barrel or pass a wall. It might be helpful if you want to keep this mechanic to add a reason that the player can only access the light world for small periods of time (timed mechanics, enemies disappear, negate projectiles).

Upgrades feel overpriced. As the game progresses, you tend to either be wandering around smashing barrels, or dying immediately to a bat. In this sense it also feels slow to repeat this over and over to get a small upgrade.

Bugs:

Didn't see any.

Great job!

Okay I see were you are going with that. the idea of a kind of roguelike loop, upgrades, the power of light...it was cool to play and I had fun ! I think with more tim you could have added a bit more information on how to play, what to do...and I also think the upgrades might be abit too expensive

However still, good game, proper graphics and a lot of creativity. Welldone!

I think this game has a lot of promise. I'm a fan of roguelikes and puzzle games, so anything that tries to combine those two genres already gets points in my book. The main gameplay mechanic is interesting, and the way it's used to create mazes is fun! The cost of ability upgrades feels pretty restrictive though, especially on the health side. Dying in one hit is very punishing, especially given how persistent the basic bat enemies are, so I would've expected to be able to upgrade past that point quickly. Instead, it takes 500 coins to get that, when it tended to take around 5 minutes of gameplay to get 100 coins. I couldn't get very far without a second heart, so my gameplay consisted of grinding coins through the first 2-3 floors, dying, and then repeating without being able to improve my character at all. This got repetitive pretty fast as there's not much to do other than the mazes, and I ended up quitting before I could get that upgrade. This always makes me sad, since I can tell there was a lot of effort put into this game and there may have been cool new experiences past this point. If the upgrades were cheaper or the player started with more than 1 heart, I think I would've been much more willing to continue onwards. Most of the rest of the game felt good other than the need to grind for coins, so I'm hopeful for the future of this project!