Thrust

Thrust is inspired by a 1986 video game of the same name released on the BBC Micro. 

The player is able to manoeuvre the spaceship by rotating and thrusting.  The spaceship can fire projectiles that can destroy the red generators and also projectiles fired from the generators. 

Once the spaceship collides with the blue sphere, they will become attached at which point the player can complete the level by thrusting to the top of the game world.  A level can only be completed if all generators have been destroyed.  If the spaceship collides with a projectile fired from a generator or makes contact with the landscape the spaceship will be destroyed. 

There are 5 levels in total with increasing difficult and a player has 3 lives.