Good job! The theme wasn't really used, as failure is progress wasn't really the same theme, but I see what you were thinking. It wasn't all that original, and, as you said in the description, there were several bugs such as being spawning two bobs when dying due to spike (which I'm not entirely sure if that's a bug or not). The art wasn't all that great, and although you don't need full-on sprites to make your game look good, at least cohesive colours would've been an upgrade. The sound was ok and not bad. The movement was generally bad and it seems you used Rigidbody2D.AddForce, which generally isn't a good method for player movement in side-facing platformer-like games.