I usually work with Unity, but in this case I would probably go with PhaserJS... it's much easier and lightweight for this kind of games imho.
Would love to participate btw, but I will never have time to create a full game on my own this year :(
If anyone wants to team up I would love to take care of the music and sfxs for a submission (I am quite good with LSDJ on an actual Gameboy, if we want to go for an authentic sound :) ).
PM me if you are interested (email is on my profile page).
Good luck to everybody!