Simple cannon.

Left vertical slyder power of the rocket.
Right horizontal and vertical slyders open/close cannon.

P.s. at first turn on one of the slyders, the cannon wil open. Then fire the rocket and without turning off 1st slyder you should turn on another right slyder. That's all!
P.p.s. Give me likes and subscribe!
P.p.p.s. if the rocket is stuck, restart.