This game looks good and has potential but it does have a lot of flaws level design wise.
This game gets tedious quick because of the fact that you have to collect the same coins over and over and every single time you die you start at the beginning of the level. This could be improved by making it so that you beat the level once you collect all the coins (so the player can do it in any order they want without backtracking). Or you could make it so that you don't have to collect coins and all you have to do is reach the end. This is just my opinion but I do honestly think it would improve the game. Keep up the good work.