Crash Bandicoot Prototype, Part 19: Heavy Machinery
It seems like a certain enemy isn't quite finished yet. They can still hurt you, though, and you can only kill them with "super holboga", as I like to call it. Other than that, there are quite a few changes in the design. For example, the part where you jump into the pit is now a short cut instead of a short secret area that leads you further back in the level.
The location of the first mask is now above the gap instead of right above the arrow crate, and while that is only a minor change, it makes things a hundred times worse if you want that invincibility. Since you are pushed a little forwards and then stop in mid-air while getting invincibility, you need to hit that mask in a very specific way in order not to die.
I also failed a little near the end when I missed a few jumps.