You need to put "Scorspace jam_Data" and "MonoBleedingEdge" into "GAme" folder. Nothing else is needed.
It's a space arcade like prototype. But game mechanic is under the question. M.b. asteroids should have unified size? They can go in rows, so you can fly into the "windows". And also you can add one additional mechanic: boosts, weapon, control issues, whatever. It can be good arcade in "flappy bird" style.