Very cool game that presents a consistent style of graphics of yours! The lighting of the particular system is very effective and increase the emerging feeling of the game. For improvements, more tutorials and easy-in levels are definitely welcomed. I love the idea of "Health Bomb" but I feel like it is very overpowered, make the shield redundant in some way, I almost never use it. Probably consider power up the reflected projectiles, or instantly suck in an enemy spaceship and use it as a missile against its own race. Lastly, consider making the lava pillar appearing at an earlier stage. People are missing out.