The theme, art and music are great - gameplay wise it's a fun platformer, but on my first playthrough I couldn't figure out how to attack but was able to make it through the game by tanking damage and respawning at checkpoints. Only when I made it to the red character did I realize that there had to be some other mechanic at play because I couldn't get out of that pit area otherwise. I restarted the game and then after watching the intro that showed their abilities (nice way to explain the mechanics btw I guess it's on me for missing that the first time) I just started button mashing until I found the "attack" button.