Hey there!
It would be interesting to know how much of the game's system was made during the jam. We assumed that the settings menu and achievement system have (majorly) been made beforehand. While a good settings menu is great to have in a game (as we do too), we did think its scale and settings like resolution are unnecessary for a jam game played in the browser. The achievement system was a bit too much. Like how it's not really a feature you specifically made for this game, during this jam. Which is fine, from what I've read you have adjusted it for this game.
It will just feel a bit loveless, if you'd include it in your future jam games, as you focus on creating a product and not challenge yourself to create an experience solely for that jam.
The character controller is nice, but we wished for a "hold down to drop faster" mechanic, especially with the amount of verticality you have. The story is very thoughtful and the voices are really good! Especially pinks voice seems amazing, I wonder how you made that TTS-Module work (please tell me!) so well!
We were surprised to see the game end after the first boss fight. The difficulty was fun, but the gems felt kind of pointless, as you seem to only be able to purchase one upgrade per run. I did see a different amount of starting gems (from 24-78 gems by random) whenever I died, not sure if that is intentional.
I liked how the blob animation on corners look, some more animations could make him look a lot more fluid!
The music is okay, though it is getting a bit repetitive after a while! ^^
The font seems to have had some problems sadly, also the translations to German weren't completely correct, from what I've seen. You also had some typos in the English version.
Overall one of our favorites in this jam!
Edits: Clarification and typos