Incredible. Loved every second of it.
Genuinely felt like a Gameboy Color title.
Great animations, art style was top-notch.
Favourite parts were the music and gameplay.
(Nice donkey kong land + pokemon gold/silver vibes)
Favourite song was the 3rd round music, I think.
Would pay for this game if there was even more to offer.
Few notes/Suggestions
The 4th rounds music might be a little toooo similar to Donkey Kong Lands cover of Aquatic Ambience.
Maybe add a tutorial level?
Animated tiles?
Boss fights?
Scrolling levels?
In general, would love to see more!
Great work.