After the first 40 seconds, the middle part of the song starts to seem fairly repetitive.
You said yourself in the description that this is a work in progress, and while I don't know what your plans are for the rest of song, I'll try my best to make some worthwhile suggestions. :)
The focus seems to be on the 'whawhawhawawawa' sounding synth, so variation could come in the form of additional drums,beats or even other synths coming and going at different points.
As well, the 'whawha' synth seems to be roughly the same length whenever it is played. Towards the end when the other instruments become quieter, a distorted and shorter version of the synth could be used periodically before disappearing again.
Whatever direction you take this song, I definitely think it will benefit the most from more note variations, additional instruments/synths and parts with higher or softer levels of intensity; especially the middle.
That said, this song has promise. I look forward to seeing what this becomes in the future. :P