The font not being clear is my bad i was playing with some new fonts to see if they would look good with the rest of the aesthetics which is why there are 2 different fonts in the game.
Shooting upward only was a design choice because there's not much to do in the game and being able to shoot in any direction would make the game dull pretty quick.It also adds some difficulty to the game which fits well with the kind of survival vibe.