Blah...
this is just not very nice...but not horrible if you're just starting.
the drum buildup is kinda nice in here but would fare to be repetitive after a minute-its a basic not very interesting bit, so I suggest spicing it throughout.
Just as the melodies there is some major clanging in the bass...try to either spread your chords apart more or just dont use chords at all in lower octaves(here it just sounded overly muddy)
on the compositional side, its pretty decent for suspense. The basslines are nice and have a bit of a creepy feel. I like the synths that sound like something falling from a sky.The melody around 1:00 is pretty slick, I definetly would have used this again in the track..and throughout the track, and possibly slowly increased the volume throughout... Another thing you could implement into this track is some freaky high pitched riffs utilizing the same melodical themes used in your track.
Good choice with the samples and synths...but clarity is a huge issue here as mentioned below. the drums sound cheesy as hell, try adding some reverb effects and mess around with equalization. Some minor clipping as well and the quality isnt all that great.
Not a bad piece of music, just needs some work to make it have a more climatic feel and better miastering. Keep it up though!
liasmen 
