Hi and many thanks for trying my game :) The controls are as follows:

1) You can move with arrow keys. If you're using 0.32, you can switch to WASD with F9.
2) You can get into the workshop, read signs and into the ice cream van, using ENTER.  Be sure to be in front of the van (from your perspective)  and at the workshop door, so you can activate them when pressing ENTER.
3) You can mix ingredients and sell ice cream using the mouse. To mix, use left mouse button (click on an ingredient then click on the mixture bowl - it is not programmed like drag and drop, but click then click again). Also pick up fruit from trees, plants and items from the ground using the left mouse button (if close enough)
4) You can switch the ice cream you have in your first 12 slots of the workshop (which will be the ones shown in the van for selling) using the right mouse button.
5) Check out the recipes of bases (which you will need for creating sorbets and ice cream, respectively) on the game page on itch. For example, a water base is done mixing one water and one sugar.
6) After having bases you can mix them with fruits, plants or items to create ice creams. For example mix 3 limes with a water base to create lime sorbet!

Thanks a lot! Let me know if it worked :)