Abandonware.

Game isnt finished. Never will be. Still worth buying on sale for a couple of bucks. Id give it a positive review if it cost just a couple of bucks but its not worth its current asking price. Too bad because, even in its unfinished state, one can tell that the original developers had put a lot of detail into this game. Woulda been nice had they completed it.

So: Negative review at the games current price point ($18)
Positive review if the price drops to something like $6.99 or whatever.