I like the interpretation of the theme! It took me a while to learn how the game works - didn't notice the "lives" in the top corner, so wasn't sure which things made me lose and which didn't until I re-read the instructions and played level 4 several times. It might have been easier if the instructions just said "keep GW at 0 or at least close to it".
The mechanic's pretty interesting when you understand it, a kind of puzzle-management-survival-arcade game. Had to learn how to make my drawings efficient so the lines wouldn't block future paths. It was a nice challenge, not too easy to win, but not impossible either!