Hi, I just engraved myself in the highscore for the jpeg level with 17 seconds. What a lovely competitive game! I had great fun just "shooting from the gut" (no minmaxing, just did the movements i would do "instinctively" to get to the requested position)
I particularly cherish the "show me the moves of leaderboard games" feature which hopefully can serve as an educational resource.
In regards to how the leaderboard is constructed, i noticed some of the top players are at 1 second, which doesn't seem humanly possible to me (that would amount to < 0.05 seconds per move). my assumption is they are using scripted input, which with this interface will be hard to prevent. i read you are still figuring out how to regulate everything, so here's an idea: if you rank the leaderboard by number of keystrokes (might consider special handling for shift etc.) instead of time elapsed, you will get the most efficient leaders instead of the fastest ones - that way scripting wouldn't help cheaters anymore.
All the best moving forward!