After quite some time working on my game, I have an Early Access sitting on Steam. The Early Access doesn't still contain the main part of the game I have been working on (the Story Mode). However, it features a simple Horde Mode that can provide about 1.5 hours of gameplay.
The Maps
Here is a screenshot of the first map:
Every map features five enemy waves. After each wave, you get a chance to fully repair your ship, restock on ammo and swap weapons, thanks to the Cargo Ship.
The Weapons
The weapons are all based on hard science. There are five types of them. In addition, a variety of weapons can come in multiple levels. So, for instance, you have a Gatlingun L1 and a Gatlingun L2, where the L2 has better heat dissipation, and hence it doesn't overheat as quickly as the L1.
The Enemies
There are five main types of enemies, but almost all of them come in multiple variations (with different weapons).
The Gameplay
The gameplay is fast-paced. The physics are quite accurate, and the hitboxes pretty much correspond to the visuals.
Remember that the game is still in Early Access (Please, read the Early Access info on the Steam Page). In other words, there will be bugs and other issues.