9/9/2026 Update:
I spent some time polishing the game and fixing the track drawing mechanic.
I fixed the loadout grid alignment with the tray. This wasn't an actual error, the starter loadout was positioned in the center and it made it look a bit weird. Now it is positioned next to the tray.
The upgrades are now also positioned left-to-right on the tray. It looks better in my opinion.
Structures
Structures are a way to make the game harder since they block you from drawing over them.
They force you to go around them, making you spend more ink.
I went with a similar approach to the game Freeways where structures are just squares with different sprites, serving different purposes besides blocking you.
I added a house sprite which has 2 different sizes, 28x28 for the smaller one and 60x60 for the bigger one.
Each map is randomly generated and there is a difficulty logic that tries to place more structures as you progress on the game.
There are other structures that I don't have the sprites for at the moment and I also plan to add more.
And I also plan to make them useful, for example to pass over a clutter of houses you use a different kind of track or maybe they have someone waiting to be picked up inside.
I will leave this system for later and I'll focus more on finishing the sprites for the other 2 structures I currently have.
Track Drawing
I reworked the drawing logic completely.
I was using splines because at first my idea was to make the tracks drawing similar to Freeways, where you can freely draw around like a canvas.
Then I added the dotted background and I thought it might be a good idea to only be able to draw using those dots as the path, so the player can actually run out of space (probably never going to happen but it is possible)
I removed the spline logic and I changed it to only use the dots that you select while dragging the mouse to generate the track. 
I'm still working on gameplay mechanics, win condition, earn more money, more mechanics in general.
Hopefully I can have a working version soon so you can play it.