Hey that's a very nice submission good job!
I played for a bit and here's what I can say, the "tides" feels a bit too quick, making each mistake very costly and losing the progression very easily. Instead of continually rising up, making it so you need to be extremely fast, maybe it could be slower or stay at the bottom of the screen for a bit before rising up. By doing so, it would allow the player to acknowledge the danger and act accordingly. Let me know what you think :P
For the rest, I think the movements are good! The platforms often blend with the lighthouse (white on white), even with the checker pattern, it's often difficult to clearly see the nuances. This could be fixed by adding a slight overlay or border to the texture ^^
Good job on the game it looks promising, are you planning on continuing it after the jam?