I saw one of yours post about the game on Reddit and decided to give it a go.
I just finished the game and really liked the experience. Personally, I didn't find it that difficult (I just missed a few jumps), but I can see how it can be tedious.
The game has some already mentioned issues, but I don't think they're a big deal, especially because this is your first game.
I usually don't make comments about anything, but it didn't felt right not letting you know that I enjoyed your game. Don't stop making games!