Hey, you can see what each schema needs in your inventory. Click a schema there and the preview shows which logs you need.
I might add a recipe view inside the merge window later to make this easier.
Thank you for the detailed feedback. You're right, the install minigame was too difficult from the start. I've uploaded a fixed version: the early game is much easier now and it has tips. Difficulty increases gradually. More content and minigame variety are coming in the next updates.
Thanks for taking the time to write this out.