Other people would prefer to have checkpoints on this but personally. I like the idea of having to restart from the beginning, it makes it more addicting to me, to beat both my level record and time record. It's engaging. I would like to have some sound but It's fine if it doesn't. You got a good thing going on here. Keep it up. If you decide to add checkpoints, could you add a mode where there isn't, and you just see how far you go? Pretty much this.