What a fun little game. I absolutely adore the quirky axolotl. I was a bit confused as to what the buttons did (or didn't) at first, but I managed to get the hang of it quick.
As Andy already pointed out, the movement and collision was a bit glitchy at times.
It would also be nice to get some better feedback on when you take damage.
The sound design is wonderful, and the soundtrack isn't overbearing.
The level design is great, and to the point. It was easy to figure out where to go next, and the bonus hearts were hidden, but not too hidden. Perfect.
The only real big issue was the pixel filter. A lot of details were lost in the process, and the text was hard to read when you don't know what it says. it also gave me a bit of a headache.
I wish you all good luck in the showcase!