For the player sprite I decided to make a tank allowing me to draw inspirations from real vehicles, namely the Challenger 2. Using references allowed me to add more detail to the sprite.

The Projectile is based off of a Sabot shell used by modern tanks. An additional thing I would do were I to invest more into the corresponding game is to have the Sabot actually fire with its casing and seperate rather than just having the armour penetrator.

For the enemy i went for a more simple alien design as to not overload the player with lots of detail for just a simple enemy and to allow ease of changing the sprite for other enemy types.