What I liked
- I like that you went with the optional theme (I also went with shapeshifting).
- Each shape had their own limitations and uses.
Improvement/Suggestions/Feedback
- Unless you make your more accessibility friendly, sound is pretty critical in providing feedback to the player. Even if you just hastily made sounds for jumps, collection coins, and powerups, that would improve your game a lot. In general, visual and auditory feedback to the player enhances their experience and also helps prevent themselves from asking questions like, "am I even hitting this enemy?"
Congrats on submitting and I look forward to seeing you enter new month!