After I saw your YouTube video, I played the game for 10-15 minutes and managed to get to wave 4.
It has nice graphics, especially the planets, and the sounds and visual effects look good.
The ship is pretty easy to control, and there is a lot going on.
A few points that could be improved:
- The start felt a bit too difficult.
- It took me a bit to figure out I had more than one weapon.
- I kept dying, but it was hard to determine why I kept dying.
- Eventually, I figured out that when enemies passed me, it lowered the base's health instead of affecting the player.
- The user interface feels a bit in the way of seeing the enemies/obstacles, like the text "Defend the base" and the health bars.
I like the upgrade menu; it gave a moment where you can take a short rest before continuing.
Overall, it's a pretty fun way to go for a first game.