Nice game! I think it would be nice to have a win/lose condition instead of just maximising a score that is going up on the side, so we know whether we have "completed" a level or not and get a sense of satisfaction when we do so.
Oh! We hadn't considered that! Will talk about it with the team, see if something like that would fit our game. We do plan to save the highscores, so that may also help in the future to the satisfaction sense