pretty atmospheric, reminds me of some creepy cartoons. good work!

 The green ground is the most insteresting part, easily.  Lots of fun shapes there.  But the dark sky makes it all blend together.

-reduce the harch highlight on the dragon/bat thing

-lighten up the sky (also, probably get rid of the black?)

-consider dropping the tombstone completely (or shrinking it) as your ground is more fun to look at

As Gavralcraw said, it's a little hard to read. The piece is overly dark and the contrast between shades (usually the lightest and second lightest) are too weak. The purple on the bat comes off as obnoxious as it stands out the most from the whole piece.

Another thing to note is this is a good example of 'bad dithering'. You're using one style of dithering consistently when you should be mixing it up (usually around three different levels of dithering).

Overall, the piece itself isn't bad, but it has quite a few issues holding it back.

do you think you could critique this? i'd appreciate it.

I'm not very good with colour but it's a little hard to read.