Fun little metroidvania with excellent pixel art and surprisingly informative fish facts! The concept of eating fish to gain exploration powers is really great! But the fact that dying makes you lose the powers and have to repeat the same sequence to get them again leads to frustratingly repetitive play. I'd also recommend having some form of UI to show which powers you currently have. I like the fish changing colors based on what it eats, but it can be difficult to tell whether you only have the power of the most recently eaten fish, or if you retained the powers of previous ones too. But these are all minor suggestions, overall really great work!