Little error here, when you press speed up in level 17, the countdown flamethrower doesn't speed up. 4/5, simple game, when you don't feel for very hard puzzles.
i go super fast, but it's the siding part i don't get, how can you keep pressing down, then just a few momets after you start star sliding, release it and press up, i just keep losing speed. Also, the tail sliding, i always stop there, i go to mars, then, when diving, either i just the the sand because i didnt turn fast enough, either i do a belly flop. When those things does not happen and i actually manage to go up again, i can't tailslide or my tailslide just slows me down.