I've encountered a weird bug. On level 22, there a spot you can push a TNT block to the left to blow up some thorns and there's a mushroom spring underneath. Hitting the spring will make Dino disappear but still be able to move. Like he's above/below the world. It's happened twice in a row so far.
Also, a not game-breaking bug (in fact it's cute): sometimes when Dino gets hit by an enemy, they'll become half-sized for a few seconds. Nothing mechanically changes, just the size.