I do overall enjoy this. This is a great game jam submission. The graphics are cute and I really like your interpretation of duality. Very good on that part.

Some things I have noticed that you may consider
- Music and sound effects are absent
- When colliding with an enemy the level completely resets suddenly without transition. A transition, death animation, or game over screen would look much better.
- Some variation in the blocks and backgrounds can make the game feel more natural.

Again I know this is a game jam game, and I really think you did quite well on this, but I hope my feedback will help you.

It's a good little jam game, challenging but fun. No one has discussed how there's a cool Heaven/Hell motif to the graphics, where you're switching between angel and demon, and whichever realm you're in brings you into contact with the appropriate denizens. That's how I saw it, at least.

I just have a question about the last level... I'm not sure how I made it through the final door. Below the door is a switchable block, and below the block is an enemy. If you swap out the block before you reach the enemy, the enemy appears in your path and kills you. But if you try to swap out the block as you're approaching it, at the last second, you're still occupying the same spot as the enemy, who appears to kills you when you switch the block out. There would need to be a tiny gap between them to make it possible. Some combination of button pressing and timing got me through, but I still don't know how. What was your intention there?

EDIT: Thanks for the response, man!

At first it it basically seems like a time fcuk copy cat (mostly due to the dimension/color shifting while the level layout stays the same) but it runs off and does its own take with the concept, instead of platforming it slowly becomes more of a fast reaction based game with switching colors at the precise moments and it starts to get your blood boiling very fast. Only complaints i have is that it isnt visually appealing (though i get the style its going for so im not gonna pick the game off for it), no music or sound at all? which just makes the game feel lifeless a little bit, and the BS places for some of these enemies, especially the final level. other than that its a good concept/game [Right as im writing this, i saw this was made for a game jame and that makes a bit more sense why there isnt sound or music for the most part]

in general make some more levels for the game!!! (along with sounds/music but ye)

Could use some sounds/music, but I like it!