Please, keep in mind that the development of Spacefields is still in a very early stage. As you can see in this video, the enemies are still cubes. Angry cubes, that´s for sure (and a little bit kamikazes), but cubes in their most simple shape. The first enemies will start to appear in the next developer vesion (v0.3).
For the record, we have opened a public forum, so any question regarding the game or whatever you would like to ask, please do not hesitate and shoot! : )