@Z9 2022: Thanks for playing! Perhaps I should consider to spawn the Rocket Robot at round 3 first. I thought in the demo player want to have a fast overview. I will spawn in later round in the real full game.
I saw that you play the downloaded build. You can grab a Demo key for steam in Discord. Then you have steam leaderboard, Achievements, multiplayer, etc.
I have a support ticket open at Itch, if it is possible to deliver steam keys to itch user who downloaded my game. But I guess this is only supported by itch for payed games at itch.
Come to Discord also if you want to give feedback.