Good base for a game, but I gotta agree with some of the other comments and say that it is just a bit too slow. I think the crucial problem is that there is a hard cap on how many prayer points you can produce at a time, regardless of materials. So you end up with hundreds of materials waiting around for the few more prayer points you need to get more stuff. Maybe it would be a good idea to have the option to immediately cash in the bar once it's full so you can start gaining prayer points fast.