Castlevania: The Adventure/Stage 2: Caves

Stage walkthrough
It may be difficult to defeat the three bats at the start without getting hit (and lose power-ups). Luckily, Christopher can get back the power-ups just after few screens.

Enemy list:
 * Bats
 * Ball-spitting heads
 * Scythe-throwers
 * Giant eyeballs

Secret room
The second secret room is rather hard to reach, as it is past a labyrinth.

After the long bridge section, Christopher will be in a room with three falling platforms. It requires a pixel-perfect jump to reach the extra life, but there is another one in the secret room.

In order to reach the secret room, you have to follow a specific path. First, from the hard-jump room, go down the right rope. Second, in the next room get the Cross of Invincibility and go down the left rope. Third, in the following room make one eyeball explode on the central ledge, then go down a hidden rope in the secret passage.

Boss
A series of jumping monsters will pop out from the four holes. If Christopher can shoot fireballs, he can easily hit the enemies from the leftmost and rightmost hole. When an enemy appears from one of the central holes, Christopher should get stright under that hole, wait for the enemy to jump down and hit it just before it touches the ground.