Good...for the price ($1)
Steam key doesn't work (after being redeemed, says the game is not available on my platform).
The game itself is not bad, but it seems to have some technical issue: sound comes and goes, screen flashes occasionally for no reason.
Also dislike the "credit" approach, where most of the stuff is locked until you buy it.
Having said that, for $1 it's not exactly expensive. :)