First of all the gameplay does not match the ads (where is the spiky steam roller miner?). The level of ads in this game is completely obnoxious. Watch ad to collect barrel or barrel disappears. Every single wheel spin has an ad. That's 5 ads in a row. The thing that was really annoying was missing two keys during an event. I had 8 hours to collect them with 3 hours left on the keys. Missed them because I was offline sleeping when it ended. Goblins should collect the items automatically.