That's cool

Egon, I'd really love to have a story as well as music, the first was not possible due to limited manpower. What is definitely coming in a future update are longer, more complex missions (either scripted or created by a sophisticated generator I have yet to develop

The lack of music is due to financial constraints. That's what the Indiegogo was planned for, but I guess you have seen how sucessfull that went

I have spent a lot of time looking for free music, but even halfway decent stuff gets tedious after hearing it for the fifth time. The only really fitting pieces I have found are on Jamendo.com, but these bastards have tripled the cost for commercial use without any warning, so that is out of the question right now.
You are right about the monetization but I've given you unlimited repairs now

I'll look into java-gaming.org.