机动要塞 -RBT小豆泥
Play Forts like spaceships.
The thrusters are activated when arrow-keys pressed.
I recommend to use "left" and "right" thrusters for turning left or right rather than going left or right,use "up" to go forward.
Some weapons are able to upgrade to no mass type(cannon,20mmcannon,rocket,rocketemp,laser,flak,shotgun)