So I finally found time to check your game out as well! Very literal interpretation of the "only one try" trope. ^^ I like the visual effects, underlining the balls movement. However it seems to me that the ball is not following the line exactly (most notably in level 3). That turns it into a game of try and error rather than precise aiming. Also the respawn button could appear a bit sooner I think. Other than that, cool concept with quite a bit of potential!
My game: https://njamster.itch.io/wonkey (playable in browser, not mobile friendly)