Good, but there are issues.
This game has an interesting concept and a hilarious ending for those of you who are into this sort of 'evil narrator' thing. However, two huge bugs ruin it for me, both of them having to do with the 'spike-throwing' concept:
1. when you throw a spike where it hits is often still treated as a 'blank' area unless you hit it just right. in the area called 'MISSING PIECE' this was especially infuriating, as even after chaining spikes literally all the way across the gem-floor I was unable to land on them, incessantly falling through to the bottom.
2. the game lags randomly and massively while the character is standing on spikes. It only happens about 40% of the time, but that's still often enough to be bloody annoying.