First section sounds like it could be a Halloween/spooky level theme for a gameboy game. Second half where the tempo picks up is fun. Regarding the synth motiff starting at 0:50, IMO it could've been enhanced with a decrescendo during the whole note > half note > half note phrase (0:53-0:55) so that it isn't overpowering the synth that comes in at 0:57 (of course bring it back up to its current volume at 1:00 where the other synth is just holding out a whole note).