theres another way if you missed the portal. instead oh trying to defend yourself jump off the table and land in the jeep that spawns. Drive to the stove and climb up to the clock then click on the numbers and you will skip levels 5-7!
Also, if you want to discover the deepest secrets(Although I only recommend this for level 40 or higher), you can get deeper inside the fridge, take the dark portal and end up in the space map. There, you can fight Dark Badspot, the hardest secret boss in the game. His attacks are devastating, though. I tried it at level 22, but failed in less than 20 seconds. He is much harder than the actual badspot battle. Here is a list of changes:
-He spins his hammer much faster.
-He has a new attack, he will jump into the air and try to crush you with his hammer like in the original battle, but this time he will keep bouncing and send out shockwaves that deal critical damage.
-Instead of trying to hit you with rocks, he will open black holes and try to suck you inside them.
-He has a shield with 150 HP that regenerates two turns after you kill it.
Really hard.