Thrustburst

In Thrustburst you fly a spaceship through a procedurally generated tunnel inside an asteroid while different obstacles (and of course the walls) try to kill you. Your objective is to reach the center of the asteroid and destroy the Ancient Hard Core.

The controls are simple, but take a while to master. You can thrust forward to increase speed and back to brake, as well as up to go upward. Going down is what gravity does when you don't press up. The minimum speed also increases automatically the deeper in you go. There is also a laser cannon as well as a shield at the players disposal to defend against enemies and obstacles. Both are being powered by the same energy bar. To charge the bar you have to graze the ceiling or the floor, but get to close and you die.

There are a good handful of different medals you can achieve for finishing the game successfully while satisfying certain criteria. There are also 3 extra game modes to unlock (double, endless and YUS!) as well as a practise mode which lets you customise things like the shape of the tunnel or whether enemies show up or not, among other things. The practise mode is also helpful since it shows the hit-boxes of the player. One being a circle (for enemies), the other being a single pixel dot (for the walls), while the grazing is pixel perfect.