That high pitched synth during the drop is way too prominent. I mean I like it, but it hurts my ears. And trust me when I say its not my volume. It also drowns out the awesome background synth you have going on (the one acting as a bass line) and the clap is almost non-existent. This makes the drop feel really empty.
Another little nit-pick is that there is not much variation. The drops are exactly the same, same melody throughout. Not too much of an issue since its pretty catchy though.
Intro and outro are very well done. I like that ticking you have that gets progressively faster and then introduces the main melody. The piano sound is nice but it might be a bit better with some more reverb (though that is something that others may not like).
Only improvement I can really suggest is mix that high pitched synth better. I don't know what software you use, but I use FL Studio 12 and would lower the high end EQ in the mixer by a fairly small amount. If that doesn't help then I'm sure youtube could do the trcik - just search up how to mix/master in whatever program you use.
Hope this helps you!