Coin Factory

Important:
This is just an old prototype with a lot of bugs and performance issues.
I played around a lot with the mechanics of this game and created a new much more fleshed out game with it that I took all the way to steam. Check it out here:
https://store.steampowered.com/app/1302860/Assembly_Planter/

This is a game about building a factory out of machines and conveyor belts. The key feature of the game is that you can build machines containing other machines. Can you find out the most efficient way to construct your factory?

The following text is a tutorial on how to play the game. You might want to keep it open while playing.

HOW TO PLAY:
The big grid in the middle of your screen is the building ground. Each dot marks a spot where you can place something. To do that you need to choose it in the building menu on the right, press r to rotate it and then just click where you want to place it. 
If you hover over one of the building buttons you will see how much it will cost to build it. The items you have are displayed in the inventory on the top left of the screen. To get new items you need to put items into the pipe on the left using conveyors. 
The space in the middle of the factory should be used to build machines that process the items. When you hover over machine-buttons in the build menu you can also see the input and outputs of this machine. Each machine needs to have a conveyor in front of it in order to output. All the other sides can be used to input using conveyors. Machines can't directly input into other machines. 
On the right of the factroy you will find the factory inputs. They will output resources if there is a conveyor in front of them. You can see what items they output of you hover the upgrade button. It also shows you how much an upgrade costs. If you buy the upgrade by clicking the upgrade button it will double the outputs and the upgrade cost. 
The item filter is a very important game element. It allows to split up item streams. When you place it a window will pop up in wich you can define what items will be filtered out on both sides (left and right) of the filter each second. It will only filter out the items if they are input by a conveyor every second. Everything that is not getting filtered out will be output in front of the filter.
The "Create Machine" button will open a new factory where you can build a new machine. First you need to set the color and name of your machine, and then you can build just like in the factory. You need to imagine that all the inputs will come in through the pipe on the right. Your contraption should output the items into the pipe on the left. Once you click "Submit", outputs ,inputs and the cost will be calculated for your machine and it will be added to the Build Menu so you can place it in the Factory. 
Right now the only goal is to build clever machines and to get as many coins as you can using "Coin Fabricators".