Nice graphics, solid gameplay! Unfortunately wasn't able to make it to wave 10, but I did get close!

Some feedback:

• Sometimes I pressed on those blocks to place a priest ... and the click didn't register. Usually it would work after two or three clicks. (I played on Windows 10.)
• I kept saving points so I could buy the heavy priest ... but it never really paid off for me. Maybe make the heavy priest a bit more powerful?
• Maybe show the game explanation whenever you start a new game, instead of only when you pause the game. Now I was completely confused for a moment :p
• Additionally, the in-game explanation gives nice descriptions of the priests like "quick, insightful, steady and wise" (for the range priest) ... but that doesn't really tell me what they do or what effects they have. So the first few rounds I was just blindly placing things to see what would happen.
• (I know, I know, the explanation is on the game page. But I think it's always smart to have it in-game as well, for those idiots that don't read the complete game page first ... like me.)

Nevertheless, looks and plays really well, especially for a game jam game! You could easily use it as a solid base to turn this into a nice tower defense game, if you want.

(And I'm always happy to see Love2D get some love :) )