My brother made this game and I made the soundtrack. Buy it on itch.io: https://akseru.itch.io/marimoth Buy it on Steam: https://store.steampowered.com/app/1786660/Marimoth The occasional lag only happens on the recording; the actual gameplay was smooth. To reach the secret boss, you need to avoid taking damage until the Chasm (the purple world) and collect all the four wings (one for each boss). I panicked near the end and got a game over, but once you have all four wings, it doesn't matter: as long as you have continues, you are going to fight the secret boss after the cat.