hhhh's building minigame:Safety

Your goal:Build a vehicle to send the spikebot safely to the goal with the lowest cost.
Build the vehicle and the lua scoring system will calculate the cost.
No time limit. You can play it as soon as you make a derivative of this level.

WARNING: THE SPIKEBOT IS SMALL, DON'T DELETE IT BY MISTAKE OR YOU MAY HAVE TO REBUILD

You must:
Build in the building zone
Follow the rules(of course)
You can't:
Modify the existing objects
Make interactive input
Edit level settings except name and description
Use banned parts
Use banned lua commands
Use bugs to make signal <0.0 or >1.0
Use bugs to glitch through objects
Use HP control or Robot manager on the spikebot
Cost list:
Fluid:0
Cables,Jumpers,receivers and mini transmitters:0
Plank:0
Thick plank:0
Ball(wooden):0
Cylinder(wooden):0
Box(wooden):0
Corner:0
Sublayer plank:0
Breadboard:0
Platform:0
Rubber band:3
Damper:3
Thruster:5
Rocket:20
Fan:10
Simple motor:5
Linear motors:5
Other motors:10
Conveyor:20
Stabilizer:20
Batteries:10
Power supply:50
Lua:200
Other parts:1

Banned parts:
RCs
Cursor field
Cursor finder
Event listener
Key listener
Artificial gravity
Gravity setter
Gravity manager
Time ctrl
Game manager
Goal
Linear decay (you can use memory module, boundary and sub instead)
Multi-emitter (to prevent bringing banned parts into the level)

Banned lua stuffes
entity:warp()
game:finish()
game:add_score()
game:set_score()
game:poll_event()
game:get_cursor()