Baal
Here are all the coordinates of all the jetpack platforms,
in the order you should go to them to finish the game.
X/Y, X being width and Y being height: Level 1: 31/16
(cartridge 2), 02/25, 52/30 (cartridge 3), 51/00, 24/38,
62/13,02/50, 64/49, 33/58 (exit to level 2).
Level 2: 34/30, 54/12 (cartridge 4), 16/12, 00/24, 03/34, 30/47,
54/12 (exit to level 3). The jetpack isn't used on level 3.
Also, you can access the game's built-in trainer mode.
Get a high score and enter LOVEBUNDLE.