i asked the jam owner, he said "the left mouse button is completely fine as the main button. The restriction is about mouse movement being used as gameplay input, not the left click itself", so it's okay i guess :3
Yes but the ingredients need to be dragged on the shelf after being right clicked, right ? That involves mouse coordinates ! The game gives of papa's taco mia vibes, its great. But yeah this mechanic wasn't allowed I believe.
Actually it's not dragging, you just need to click once, then the item attaches itself to mouse, when you click again it deattaches, i'm asking the jam owner now :') but as i recall clicking and dragging was counting as one input, i'm not sure tho, i'll comment when i guarrentee the input thingy
