Pretty impressive and fun game. Really need a strategy and a good combination of blocks. Hope it will have a mobile platform.
One random thought for the improved version: It would be nice if the game remembered the best design for each level. When going back to improve my score, I often had to spend several minutes trying to remember how I got anyone to the other end alive, rather than iterating on that design like I'd hoped.
I have no idea how difficult that sort of save system for this game would be, but it would be nice.