-[EDIT]-
After your instructions, I played again. And i think the game has a cool concept. But it lacks the initial instructions. This can be turned into a great indie if u focus on it’s core loop / iterate it’s core loop more. I think the mistake u did was throwing player with all instructions (ex[ecting them to read). But trust me (from my past experiences, both as a developer AND as an gamer), You have to find a balance between tutorials and game (you could watch mark’s video about “Valve’s secret tutorial”. Where they let player have the control of whoom they are controling “whilst” teaching player what they can do.
For example, instead of what u did in “Door” level, u could intoduce player about your game bit by bit (“like showing them how they can attack, how not to attack, etc), before jumping them to “Actual” intended gameplay.