I played a little here, the game is very good.
Remove the reset checkpoint, this discourages the player.
Do you mean how the game resets until you get to the first checkpoint or how it resets after you've lost all your lives?
I've considered making it so that you can still finish the level but the level shows how many times you've died in the score. The game is meant to be hard, but yes, not discourage the player.