Nice entry!
The game feel is really, really good! The animations are fluid, the art style is simple but efficient, there are little particles that pops when you click something, the little sounds are cute... The level of polish is absolutely unbelievable, everything feels smooth.
The gameplay makes me think of osu! It's quite a cool little relaxing game, and I enjoy this kind of precision games ^^. Overall, it's quite easy, but the little "rush waves" took me by surprise ^^. Unfortunately, it gets repetitive quite quickly, especially because the progress is really, really slow ^^'. I think it would have been better to only need ~20 orb things to clear the water, the progress would have been smoother and more rewarding, because doing things and seeing little to no progress is a bit frustrating ^^'.
The theme is respected: there is a door, something behind it, and I want to know what is it ^^. The theme doesn't appear in the core gameplay (you could replace the door by anything else and the game would still be fine), but I really appreciate the fact that you tried to give us an original and creative way to "open the door", instead of all the "press E to open the door" games that we have, so bonus points for that (even if that makes the theme a bit less relevent ^^).
So overall, it's a
good experience! Yeah, the gameplay is a little bit weak, but I feel like the goal of this game was more about providing us with a nice and relaxing experience. And on that aspect, it's beautifully done! Congratulations!