Day 2 update: I've gone and implemented basic controls - wasd, arrows, joystic, d-pad. I've also got a basic placeholder tilemap.
Consideration now is for goblin mobility. Should our little guy be able to climb walls/ceilings, should we add ladders to the levels, or boost his jumping ability? I don't really see him being very bouncy - fast, yes, nimble, but he's a cave dweller, and I don't want the "escape" of being able to just jump away from foes - stealth is more important than nimbleness.
Tiles are also 8x8, but I'll probably go 16x16 eventually. Final layout will probably be more "warren-like." Tunnels and chutes to give our player room to play a bit cat n' mouse with the invading adventurers.