Very fun! I really like level design, there are a lot of different tricks need to be done with very few mechanics. There is also great potential for speedrunning. If you miss one jellyfish by accident, you have to restart the level though
The game looks great, too. I really like the underwater vibe with fishes swimming in the background and bubbles. My only criticism is that spikes kind of blend in, maybe they should stand out more.
Overall, it's a very enjoyable game. Great job! I loved the ending!