Hey man this is really cool and i have some input!
So starting the game was really jarring, just being placed in the game without any help or anything is not the best.
I recomend insted of puting instructions to play in the game description putting them in the game as a option in the main menu.
Speaking of you should add a main menu!
Currtly there is no way to keep score or realy any reason to kill the aliens expect the you loose screen. On topic its really hard to die from the aliens i the charctor feels too beefy.
But great going! im exited to see the game get contuined!