Thank you for your kind words! "More and Bigger" is definitely what I'll be working towards in the future, my end goal in terms of content is vastly superior to this haha.
About performances, they're quite abysmal, sorry about that! No time has been spent whatsoever in optimization for now, though keep in mind that despite looking pixel art, the environment itself is all 3D w/ expensive pixelation shader going on + real time effects (volumetric fog, etc). So that plays a role in making the perfs what they are (vs a purely 2D pixel art game), but that needs a lot of optimization! (also FYI you can turn the camera around with Q and E thanks to the environment being in 3D)