The Game
A simple puzzle platform game. Get to the exit to complete each level.
Be aware, though.. This game is more a Puzzle game than it is a Platformer. There are many weird grid-based things that are leftovers from that style. Most noticable is Platdude's very specific Jump. One up, Three across.
The Blue Circles (Super Precious Gems!!) are collectable. You don't need them, but there's a total on the main menu. Get 'em all, and you get to say "I got 'em all!"

The Controls
There's two jump buttons, and a hold button.
The hold button, B, can be used to dangle from hooks, vines and red floors. It can also be used to drag red boxes.
The two jump buttons, Y and A, jump left and right respectively. It's easy once you try. If you really dislike it, you can switch to single button jump on the main menu, but I wouldn't recommend it! Some things happen too quickly to stop and turn around!

The Level Packs
Level packs can contain many many levels, but each level must be played in the order layed out in the pack.
No saves! If you die 3 times, you're right back at the start.

The Editor
Tap the middle icon on the titlescreen to enter the editor.
Draw a level.
Hold a trigger, and a Wipe/Quit and Test button appear at the bottom. If you test a level, and subsequently complete it, and you can then also Save it from this same Trigger-based menu. Note : You can only save a level if you've managed to complete it! You don't need all the gems, but you do need to get to the exit.

The level will be added as a simple line of ascii text, to the bottom of the JNKPlat/MyLevs.lev file on your card (assuming you're using the DLDI version, and have added the JNKPlat folder to the root.)
Each line is it's own level. Feel free to copy+paste these lines to build up your own little level packs.