As neat as this idea was, I think the execution could have been better.
I think the jumping and falling movements could be slower and more forgiving.
Also the level with the spikes below the blue magnet seems to just loop.
The fish character is very cute, but the level could have been more clear in what is represented such as the spikes (maybe thicker) and magnets (more pronounced and perhaps some effect to communicate that).
Ofc once I played through it was obvious.