Your game has very cool mechanics and is good at level design but you can make your game better with the following things : First of all make the tokens valuable so the player really wants to collect them . Because without going for the tokens your game is very short and easy also you should have spent more time at art for example the tokens are just yellow circles and the poisonous water 's graphics are just effortless . Also after a certain point the game play becomes a little boring without music you should definitely add some music . But overall the game fits the theme very well so good job !