How can i make an attack system like Bookworm Adventures?

Question

Especifically the attack system (at least the random letter box):
https://www.youtube.com/watch?v=7L-Gu5Naf8c

Answer 1

Here's a small demo project:

https://github.com/t-karcher/Bookworm_Adventures

The letter box will show different letters whenever you start the program, and you can select and unselect letters by clicking on them.

Next step would be adding a dictionary and checking whether the current word matches any entry.