One of the toughest games I've ever played.
It is obvious a large amount of effort and passion went into this project, but for the most part, it is next to unplayable. I have a great deal of respect for the developers, though. Some fantastic ideas and some small sections are fun. I'm surprised I got as far as I did.
It seems the best way to deal with the absurd amount of enemies is to get them to group together and then use your explosive power from a distance.