Great game but still some bugs to be worked out. The first playthrough I got into an impossible situation where my past selves took the motor before I could. Then the game froze. On my second playthrough I somehow extracted the cassette from the walkman without it being added to my inventory. I have yet to successfully reach the end of the game.
@GenericJoe - artificial difficulty is when the things that make the game difficult are not related to the intended challenge of the game. This is genuine difficulty - the whole point of the game is to deal with the fast movement and distracting visuals.
For level 8, all non-empty test cases have an odd number of characters, which enables you to earn 20-pts for a solution which fails on even-length inputs. (Such a solution exists -- 10 boxes, 89 steps)
This game was way too easy and never required any strategy or skill. Also, I ended up spending a lot of my time walking back and forth, which gets old pretty quickly. The pixely art style is kind of cute but not particularly impressive. In summary, this seems to be a less-fun version of existing mining games. If you're going to re-use an old game concept, you should try to build on it or add something new to make it worthwhile.
Looks fun, but it just starting lagging so much that I had to stop playing. Add a "disable fancy graphics" option please. And you might want to look back over your code and figure out what you messed up to make it so inefficient and CPU-intensive.