Very nicely polished game, the jumping animation in particular is a nice touch. The pace starts off very slow and unfortunately is a little boring at first, but when it starts speeding up you sort of get drawn into the game and just want to keep going and keep beating your score. The rush to get all the spikes out the way later into the game actually gets very exciting!
It would be nice if there was longer background music because it gets very repetitive. Some more variation in the level would also be an improvement, but it’s quite impressive for coming out of a jam.