Hi Mario, sure. That is already on our todo list for one of the next alpha releases.
But did you know, that you can already assign keyboard shortcuts to you Wacom buttons through your Wacom settings software? Make sure you choose Animation Paper as the application and then just Ctrl Z and . (period) as the keys for the buttons. That will give you Undo and Toggle Draw/Erase as you are used to. 🙂
Best,
Niels