For a demake that abides by the original 3D line and object count restrictions of the era, Aperature 1p9 gets almost everything right, and typical of 1.9 levels, is easier to learn than the original.

The only sour part that sticks out is the heavy ship in the filmstrip section. I would’ve cheated and enabled Fix Gravity Bug, as it’s much more intuitive, and leaving it off still doesn’t make it accurate to 1.9, as ship physics changed in 2.0 (less wobbly) and 2.2 (240 TPS). The 3D part is also not super visually interesting, but I’m not sure it’s possible to do anything about that.