AuthenTiiq Hi and welcome

Yes, its very easy. A very simple script would just use the "etimer" commands.
It would look something like this... note, you didn't mention if after 3 mins the game is over/lost, or game was won
:state=0,etimerstart,state=1
:state=1,etimergreater=180000:newgame
Being new here, a good place to start is grabbing a syntax list of commands here...
https://forum.thegamecreators.com/thread/180924
And looking at some script examples & how to setup from here...
https://forum.thegamecreators.com/thread/192148
Now the "bots" question is a whole other matter, do you mean npc's attacking each other ?
Also, being new, note that here we try to show some kind of effort in the script before just asking for it

If your really stuck and need help, then ask

best
My games never have bugs. They just develop random features..
Lots and lots of random features...