Pretty decent game, tho there's not really too much going on which is fine but there doesn't seem to be anything to really keep you playing other than self-satisfaction. I think adding a leader board(even just a personal one) would already help a bit. Anything to keep you playing for a bit longer.
The red balls also don't give you much time to react when they spawn super close to you. By the time you realize they're there you're already dead. Otherwise they're barely a threat. It makes the game feel more luck-based than skill-based.
Graphic-wise, the game looks simple but charming. I really like the lava you got going on, you can just tell that it's lava. It looks good! Though I wish there was a bit more juice to the game, just some simple sound effects or showing the player explode or something when dying would already add a lot! Rn the game just stops if you die, which feels really flat.
One final thing I noticed is that the player is still affected by the platform's rotation even if they're jumping. So if the platform is leaning to the right, the player in mid-air will also drift to the right.
Other than that, this is a step in the right direction! It's a decent game, but I'd be lying if I said I didn't find it amusing. Good job!