This was a lot of fun! It looks great and is very cute!
The gameplay is very fun as well, but could use some tweaks I think.
I was getting stuck on walls often (maybe reduce friction on vertical walls). Also, trying to move sideways felt a little off. Moving sideways would kill my upward momentum which made it difficult to get up hard platforms, and I had a difficult time managing stamina when moving sideways. I kind of wish there was a way to move sideways slowly without using stamina or much less stamina so I could line myself up better, or launch myself in a better arc.
Overall, great job! Very impressive. 😄