It sounds a little sparse now but I think it could be built up into something cool. The intro feels like it could lead into a fast battle theme. Something you could try is putting the spooky synth on one track and the fast arpeggios on another track at a lower volume and see if they fit together, and maybe put a fast drum track under it. Repeat the section a few times and there could even be a break in the song where it's just the creepy synth part by itself. Definitely keep at writing music because it seems like you have some interesting ideas, just maybe needing some structure.