Just released!

Sorry for my English (I´m Czech).

You can see the shortcuts by pressing "F". All the menus are closed by pressing the same button again.

Pickaxe upgrades when you have the materials needed and you open the Tools menu twice.

Materials in your inventory appear when you have at least one. If you don´t have the material it won´t be visible.

This game has autosave every 30s.