Really cool game, especially when you know that this is your first published one (like mine lol). But sometimes the characters rotate weirdly, to fix that, either go to the rigidbody, then to "constraints" and then check the box "don´t allow rotations" or something OR just set the rotation to normal again in each level.
Also the game would benefit from music and sounds alot. But more importantly: I like simple art, but the blocks are often not placed really accurately and also, pick a better color scheme than this.
I hope the feedback helped you, would be nice if you could check out my submission too. :)