Its a fun game. I played all the levels.
Some levels you can't see all the way to the end from the start, and there doesn't seem to be any way to preview the level, which feels a bit unfair when I have to decide how much to wind. You could let players pan, give them a minimap, or just tween the camera moving from the goal to the start to give an overview of the level.
Level 20 "The Long Way" was the hardest level by a huge margin. Much harder than the final level. Its difficulty felt a little out of place (or at least, like it should be the last level rather than the second last). I spent a lot of tries on it and eventually trying to wind the same amount with a mouse each time became tedious. It was fine on the other levels but the huge number of repeats and difficult steering got to me.
Please give my entry a try - https://william-ritson.itch.io/alchemy-isle