Hey! If you are looking to just have some premade assets for your lowrezjam game then look no further!
Micro Venture - A 4x4 topdown zelda like pack.
Micro Chat- A 5x5 and still very legible pixel font.
I have free options as well sadly the smallest of those is only 8x8 (maybe I'll do some free ones smaller in the future).
Paper Pixels - A 8x8 platformer pack with abstract visuals.
Retro Lines - Another 8x8 platformer pack with abstract visuals.
Hope this helps some of you out, if none of these fit your style just brows itch a bit, other 4x4 assets exist, and of course many 8x8.
Cheers!