Hey, nice set. A tangible improvement. Good colors. Dark, moody. Even a little better on the pixel tech.
I suggest making the ladders stand out more. They're more interactive and therefore deserve more priority than the same-colored blue bricks. Same may go for the pit spikes. It's nice for the eye to be able to retrieve all the most important information at just a glance. The more work the eye has to do the more "exhasusting", possibly irritating it may be to navigate your levels.
I guess I'll have to see the those two enemies animated before I can tell what they are. Don't understand the light upside-down trapezoid either.
Why not try adding another tile, between the border brick and the dark blue bg tiles.