A very well thought out and polished puzzle game. I'm impressed with the different amount of mechanics presented, as well as the ability to mod and add custom levels. How did you go about designing some of the levels? I had a bit of trouble solving some of the levels.
Making levels was easy at levels x-1 to x-4, but then it was getting harder as no ideas came to my head. Also the guy that made sprites have made some of the levels, but I made them harder.
My plan for making levels was like that:
1 - Make an already completed level with complicated path;
2 - Make it harder and harder by adding changing something or making some actions forced;
3 - Maybe add some objects which are not needed for the game (you can place them on the level so that they are not used)
4 - Replace some objects so the level is not already completed