Some advices to unlock hats, get 25 combo in whack a seal, go movie theatre drag up and click in mouse house (use mouse hat to get the key), go skool and take the chest with the key, go credits, click on the left of penguin head to find secret cave move the mouse over the icecream to eat it and get the hat, win octojackpot in roulette, cook 2k burgers, sell 5k burgers, finish 80 quest. Enjoy it!
More suggestions: it would be fine if we have better chances to get goldfish, some kind of minigame (ping swiming in the ocean hunting goldfish, or an aquarium where we can farm goldfish). Also i wanna cook some shrimps for my burger! Add more recipes :)
Some advices to make lot of money... First fish a bit and deposit all your money in the bank, claim interest until you have snail hills, buy autocooker and sales counter and begin your burger empire! PD: If you drag up the white box in movie theatre you will have a little surprise :)
The song is "A las barricadas" an spanish anarchist song. Negras tormentas agitan los aires, nubes oscuras nos impiden ver, aunque nos espere el dolor y la gloria contra el enemigo nos llama el deber!
 "Kittens Game")
 "Sancho Ponchek")
 "Idle Evolution")
 "The Last Door - Chapter 1: The Letter")
 "GrindQuest Expansion")
 "Pingy the Ping Idle RPG")
 "Spectromancer: Gamer's Pack")
 "Racing Comrade!")
 "GrindQuest Beta")
Try increasing your mouse speed a bit (from the Windows control panel), it helps a lot :D