As it turns out, some people didn't like the fact that the ProtoGalaxy demo was more difficult than the game itself. So, we've released an update to tone down the difficulty of the demo.
ProtoGalaxy Demo v1.0.7 includes an additional level, improved tutorial and difficulty, and all the latest features from ProtoGalaxy. The demo is available on ModDB, Steam and the Source Studio website. ProtoGalaxy is multiplayer space adventure. Up to 4 players can team up to win battles, solve puzzles and explore the galaxy. ProtoGalaxy pays tribute to days spent in arcades, when games were challenging and players teamed up to beat the next level or get the highest score.
And if you still find it hard, there's no shame in starting off on easy mode ;).