http://imgur.com/Fh4T7j7
its a little rare bug that I got recently where you kill level boss and complete level objective and then next level arrow just don't show up. I can't proceed unless I go back a level, which sometime I can't do that too because of some issue I have already reported here(http://forum.codenameentertainment.com/?thread_id=11791) and also the auto progress(g key) don't do the trick in this case but close and reopen the game solve this issue just fine :)

ps. I'm on steam FYI
ps2. in the image you can see that turky and orc got a-ha buff icon on their head too which I find that its just another display bug or something, the actual gold bonus is correct.