Love the level design and mechanics of a tranquilo (hope I spelled that right) mode. Love the easter egg of hiding one tranquillo behind a wall. Also the introduction of the Stronger Enemy is a brillant idea, that caught me off guard!
Your game surprised me during the following moments:
1. The introduction of tranquillo mode and the map changes in order for me to pick it up.
2. The climbing mechanism
3. There's even one more level after I thought it was finished!?
4. the Strong enemy that killed me several times
5. The art style
6. The intro and ending piano
7. The voice that tells player what to do
I think it's a very nice game!