Thrusta

In this game, players navigate their spaceship around a single level where
eight yellow eggs are stored. These eggs release several creatures, and it is
the player’s task to crush them with an egg scattered around the level. Once
the egg is used, another one reappears on a different platform than the last
one. The player proceeds to the next level when all the creatures have been
destroyed. Stopping the player from completing their task are airborne enemies
which can be killed with the ship’s built-in laser.