I also interesting in implementing such plugins for plaformer, but I am not familiar with what kinds of function that the platformer should include.
@rexrainbow you already did a set of controler for the player, with Ship and Eight direction. It could be have a controler for sidescroller with left-right and jump. To be extensive, there are also numerous other possible movement in a platformer as double jumping, mid-air dashing, wall climbing/jumping, flying etc.
I am also thinking.about proposing to make a collaborative weapon plugin, to deal all kind of weapons you can see in topdown and sidescrolling games: There are already a weapon plugin but it only deals with bullet while there is much more diversity: short range, projectiles, boomerang, missiles, grenades, laser, timed bomb, defrag… That could be fun to make and really usefull for many games. I should start a thread about that soon.