When I move vertically, the border of my health bar dissapers sometimes, then it appears again. Also the sprite of crab "flashes". I would also make him smaller but flashing is getting worse. I have loaded texture as 2D pixel preset.
On web I found that maybe camera smoothing causes it but there is no difference if I have turned it on or off.
I tried to play with different rendering settings like FXAA, vsync etc. but I didn't noticed significant change.
When I make things very big then it is okay but that is not a solution. I guess it has something with scaling down?