Making a Grid Game in LibreOffice

Hi. I want to make a grid based game where people try to guess where a hidden pic of treasure is. For example, the horizontal section will be letters and the vertical section will be numbers. They guess E2 and when E2 is clicked on a predetermined image appears, maybe the word no or a sad face.One square will hide the treasure picture. So it will be kind of like the game Battleship if you are familiar with that. Are there any tutorials about making this kind of game? Does anybody have instructions or advice? Thanks in advance.

Have a look at Extensions and templates.