Monster in My Pocket/Stage 1: Monsters in My House

Area 1
At the start of this area, there are two monsters - Zombies and skeletons. The zombies are the most common, approaching from the left or right and going in a straight line. The skeleton is a bit more dangerous, as it can throw its head as a ranged attack.

When you reach the bed, you will see Hunchbacks jumping in from the right, followed by two witches that teleport in to make a ranged attack.

After the bed, there's a final wave of zombies and a skeleton. Continue right to the door.

Area 2
After a few zombies and ekeltons, you should see a stand just before the stairs. If you want to complete this area more quickly, ascend this stand and jump onto the railing. You'll slide down, crashing into any enemy that contacts you.

You can choose to go down the steps instead, although this has more monster spawns.

When you reach the bottom of the staircase, you can continue right, picking up the Heart-In-A-Jar, and proceed to the door to reach the crawlspace.

Boss
In the final room, you will fight against Spring-Heeled Jack. After an initial rest period, he will jump into the air, and throw a fan of three daggers before landing. Three jumps are made in succession before he takes another rest, but isn't otherwise difficult.

Spring-Heeled jack needs to be hit 17 times to defeat him.

When you complete the stage, you should have received an extra life.