hmm with a tune this minimal there is no reason why you shouldn`t have a nice hot signal.
I think the problem lies in a number of areas.
This track for example, I think could just use better treatment of the sounds.
When you make something this minimal, there is a lot of room in the mix, so you can make the sounds really big.
Compression over the individual tracks and a much better use of Subractive eq will raise the overall level of your tune without cluttering the mix.

Once you have filled out a broader frequency spectrum and your tune is fuller, subtle use of a nice mastering compressor and ultramaximiser will raise the levels even more, just don`t overdo it and crush the sound.