I gotta say for an old 2011 flash game this isn't bad at all.
Graphics while really outdated and goofy are charming for the time they came out and even today, the song choice loops really well but isn't much that it gets annoying. The gameplay is simple but active, it's honestly feels like a 2D sidescroller version of Q*Bert. One complaint, or 2 I really gotta say is that the achievements cover up stuff or appear a bit too often, but at least actually unlock stuff to the player to aid them. The last thing would be how some of the later levels make it like really hard to avoid getting hit, like one area I couldn't quite get the last square cause of a whole horde of those guys getting stuck in this one bowl of a platform. Otherwise this is a surprising delight to see tonight.