This is lots of fun. Very impressive for the limited Dev engine. Great Job.

Hey mate. Some feedback:

- I like how your game is 1.5 bit. Hmmm yes few colors.

- I like how fast-paced your game is, but maybe you could have made it just a little bit slower?

- The fact that the black player would get hidden by the x/5 UI was kind of irritating as one or two times I took damage there that felt unfair,

- I wish it'd restart automatically after the player dies, as one needs to reload the page after they die if they want to play again, which breaks the flow of the game.

I could not beat the game as this "boss" did not want to take damage and you did not tell me how to make it take damage:

I love the visuals, and the gameplay feels really good!

I would consider adding a invincibility timer after you get hit. I got absolutely destroyed by those masks that shoot more than one projectile at once and lost all my health on one go. I would also consider making some enemies only be hit by the guy on one side. Since the enemies go from one side to the other, you could be fine just by sticking to one side.  

Other than that, great game and great concept overall! I absolutely love the mechanics!

Concept's quite good. I loved flipping between the two sides to hit enemies easier. Art is in a very good 3-bit style, and the music and sound effects were used quite well.

Two issues, though. First is that it doesn't reset when you die, so you have to reload the page. That's really, really annoying and was enough to put me off of playing too much.

Secondly the controls were a bit weird. Using W to flip felt really strange, and I never fully got the hang of it, mostly due to the no resets thing. Swapping W and Spacebar would feel more natural, I think.

Overall, the game is still pretty good, it just needs some polish!

The game was really fun to play. 

The gameplay felt smooth and I didn't notice any bugs with it. 

Audio and visuals were good. Nothing groundbreaking but consistent in itself.

The side swap mechanic was a nice touch but not really necessary. I only played as the guy on the bottom and had no problems with it. Maybe you could have added some enemies that only stick to one side so you are forced to swap.

Anyway, good job!

Nice game but the game freezes when I die...
Pls Rate my game also!

Cool game, but I found the final boss really easy (died in like 2 shots). I liked the art and music, good job!

Good game, really fun. The core mecanic is very interesting, the game is challenging, and visually the games is gorgeous. The only problem I had was that I had to reload the page every time I died, and when you add to that the fact that you can loose your health very very quickly (I guess an invicibility time could help a bit :D ), it can be bothersome. But that was gloabaly the only problems I had, they are important but, everything else is very good. So overall, you did a great job, and I enjoyed testing your game, well done! :)

This game is actually really fun! Movement and attacking felt pretty responsive and was super fun to do! My only complaints is I wouldn't switch to the black shade since I wasn't used to controlling it very well, but it felt weird because your jump was going downwards. Maybe you can flip the screen when you switch shades? The other thing is adding I-frames after getting hit, which is nice since some of the enemies spam projectiles and instantly kill you if you aren't careful.  t also seems like you get softlocked when you die unfortunately. Other than that, the game is very fun!

Really fun game! I like the concept and the visuals + audio are amazing! The game play itself feels awesome too! 

My only suggestion would be to make the final boss a bit easier and maybe add a bit more importance to switching sides.