I want a debugging console!
As for multiplayer, was a Super Mario Galaxy model considered? I'm not sure how you could implement it in Abe HD (Gameplay-wise), but if done right it could probably work. It could be another Mudokon assisting Abe (Alf? Big-Face?) with a different set of abilities, and maybe 2-player-exclusive bonus areas that require 2 players to solve.
(In SMG, a second player could join the game and help Mario collect items by pointing at them, freeze or kill some enemies, and enable Mario to do higher jumps. While this exact model would probably ruin the game, another assist-type model might work)
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