alright, i just beat the game. so the instruction is simple, drag the first item on screen to slowly move it in a circular motion. i am not entirely sure about the generator but i set it to 4 and spin the stuff around and grind the upgrade up. eventually i just spin and got into a loop of not being able to go up and set the generator to zero and notice the spin number shown is getting higher. 

at this moment you will realize the spinning has generated you so much money, you buy out every upgrade. and you should see the black hole "stabilize", whereby you just click and hold on the blackhole your object spins around it. 

now here is the tricky part, when you buy the heavy object it says it will break under 4500, and your small object slowly getting destroy at 5500, so now is time to use all your hand speed to make sure you click on the black hole so your object spins above 4500 and buy the heavy object as fast as you can before the small object get fully destroyed.

when this is done, congratulation you have reach an ending.

but ya, i think the instruction needed to be more detailed, and the upgrade i actually do not know what it impacted at all, i just go with the instinct of playing enough idle game to get the upgrade and finish the game lol 

what do i do there are no instructions