The preview image got me thinking that it'll be some hardcore platformer like Super Meat Boy... but got disappointed (as no other screenshots were presented on a page). This game has 3 levels, and each of them is equally confusing (at least for me). Player's actions are very limited. So even in music level, it doesn't really feel like you're creating something yours, there's no fun factor in it. And, unfortunately, didn't get to the boss part, that level was quitting point for me. Also some background music would be nice. The game is not bad, but could be better!
You can watch my playthrough at https://www.twitch.tv/videos/325949658?t=01h09m39s
Also be sure to rate my game too https://itch.io/jam/blackthornprod-game-jam-1/rate/319192