Area 1[edit]
There are two monsters here - one is the hobgoblin which simply walks towards you,
You need to reach the top-left corner of the linked fence. Keep jumping up and to the left. While there is a heart in the jar in the bottom-left corner, it's easily skipped with no difficulty. If you reach the top-left corner and the game won't proceed, you will have to jump once again to ensure the camera is aligned with the rest of the stage.
Continue left until you see the crane hook, then jump on it. The crane will then continue and carry you across the stage as long as you don't fall off. However, you will be swarmed by Baba Yaga. The safest way to deal with her is to crouch and keep attacking to the right. There is the occasional monster that may cause an attack from two directions at once, and you may need to jump to avoid becoming sandwiched. There is also a heart in the jar below, you can grab that to take a small break from attacks.
The crane stops just before a platform, protected by a Kali. This monster will periodically use a ranged grappling hook, just long enough to cover the platform. Start the jump when the hook is fully extended, and attack Kali three times. If you're a little late, you may still be able to double jump over her hook
Area 2[edit]
The second area is a tower climb.
First is a chimera to the right who will breathe fire and attack - his main threat is surprise.
When you start the ascent, each truss will have a Red Cap waiting on the upper portion. When you approach from a moderate distance, it will jump forward and slide towards you. It can be defeated in two simple hits (the first locks it in place). The first truss contains one red cap, the second contains two, and the other trusses will have more. At the top is a heart-in-a-jar, but there's a chimera waiting if you simply grab it.
After the first climb, there is a series of chimeras. Simply jump as soon as they make the fire breath, and attack.
On the elevator, you will be attacked by harpies. They enter in a simple pattern, approaching in a group of three in a single swoop. Stay near the center of the screen, and attack as they make their swoop.
Boss - Gremlin[edit]
The Gremlin is the stage 4 boss. He simply moves in on the crane, lobs four grenade projectiles, then leaves. The grenades themselves are evaded simply by standing between them.
The most dangerous part of the gremlin's pattern is his approach from the right. After he throws the grenades, he will continue to the left, and this doesn't give much room to both dodge the projectiles and the crane. If you need to play safely, you may want to forgo attacking during this movement, and simply be further away.
You need to hit the gremlin 25 times to overcome him.