Checkpoint 16/Regular boy1 version

Description
Checkpoint 12 revisits features of many previous checkpoints, now in more difficult arrangements. No new gameplay mechanics are added.

This checkpoint has 4 segments.

The Mayhem bosses are 3 triple-cells.

Shorts

Shorts

Shorts

Stage 1
Stage 1 goes at a fast speed. 2 Infinite Balls power ups appear at the beginning. five types of sections appear:


 * 1) A series of 5 glass sheets, alternating floor, ceiling, floor, ceiling, floor.
 * 2) 6 spinning glass panes, starting with 3 directly in front of the player, then 2 to the left and right, and 1 above the player.
 * 3) A tunnel with 2 glass propellers at the start and end. 2 more propellers appear inside the tunnel.
 * 4) 2 3D Star crystals on short pedestals.
 * 5) 4 sliding glass panes in the floor.

This level has only a floor, like the Mayhem boss of Checkpoint 2 or the first half of 10-3.

Stage 2
Stage 2 goes at a slow speed. 5 sections appear:


 * 1) 2 big squares on strings with metal in the center. The first is at the bottom left, and the second is at the top right of the player.
 * 2) 6 hammers on the sides swinging inward, then 3 swinging hammers in the center.
 * 3) 1 laser on the top and bottom, followed by 3 lasers on the sides.
 * 4) 1 mega laser
 * 5) 5 up/down glass sheets and 4 up/down glass sheets on shorts.

This stage is a large square-shaped tunnel with a pyramidal crystal on the sides. At the middle, there is an Infinite Balls with 8 pyramidal crystals.

Stage 3
Stage 3 is rotating. 6 sections:


 * 1) 8 shifting glass panes in front of the player.
 * 2) 3 cross bars touching each other.
 * 3) 4 up/down glass sheets on random sides.
 * 4) A sequence of 6 spinning glass panes on the sides.
 * 5) 8 crossing glass sheets in the square.

Right before the door is 4 star crystals.

Stage 4
Stage 4 goes at normal speed. 6 sections:


 * 1) 4 sliding glass bars.
 * 2) 1 rotating lasers
 * 3) 10 crossing hammers, alternating left, right, left, right, up, down, up, down, then 2 below the player.
 * 4) 4 sliding glass panes, alternating between left and right.
 * 5) 6 6-bladed propellers above and below the player.
 * 6) 5 squares on strings, alternating left-up, right-down, up, down, and center.

Right before the door is 2 octahedral crystals.

16 crossing hammers, starting 8 alternating left, right, left, right, up, down, up, down, then 4 swinging hammers swinging inward, 2 hammers above and below the player, then 2 swinging hammers in the center.

Music
12-1: 1-3

12-2: 9-1

12-3: 11-1