Incredibly clever idea and design! I very much enjoyed my time playing through to the end to see the different ways it would be expanded upon. Aside from what others have said that levels 4 and 5 should probably be switched, my only real comment is I want more levels, with how intricate the solutions became by level 6 I could only imagine how crazy they would get if you had different die designs (that either match to specific blocks, or that build on top of other die designs towards a target image similar to woodblock printing)
Amazing game!