This approach makes game design a bit harder. With a normal approach, you don't have to consider play area limitations this much. And this gets especially considerable with a shooter. Although I plan to add melee weapons, I didn't want melee to be the main way of killing enemies. And the physics system is another issue. That said, if melee is fun, I may consider a fantasy game in the future. Mines and dungeons twisted by a mage.
The only way to contribute right now is to buy the game via itch. I was thinking about early access but most likely I will keep the development more or less open till some point and then just go with the actual release.