I wanted to introduce a mechanic and give the player a few levels to try it out and get the hang of it. I then add a new feature and continue doing that. Some levels are just stupid easy simply to teach a new mechanic. There are 12 levels in total and this is the layout:
1 - core game
2 - core game
3 - multiple tiles (easy)
4 - multiple tiles (medium)
5 - multiple tiles (hard)
6 - colored dice tutorial
7 - colored dice (easy)
8 - colored dice (medium)
9 - colored dice (hard)
10 - mix of all game mechanics so far (medium)
11 - teleporter tutorial (easy)
12 - teleporter (medium)
While designing levels, I would play them multiple times to get a feel for how hard they were. If I felt the level was too easy, I made the level even easier to avoid frustration. I could have made more levels, but I felt like 12 was plenty for a game jam game.
Hope this helps and is the info you are looking for. Thanks you so much for playing!