I've added man of your suggestions, check the new version
Pretty cool, thanks! I already tried the latest version and all related to gameplay seems perfect to me.
Just a couple of suggesitons:
It would be cool to see a background instead of the black screen and if you want to make the game more challenging you could make that some pipes/walls are "closed" so they block the path and the player has to shoot a target in order to open them. But great work, thx for sharing.