That looks really nice overall. One crit I have is that mountains do not generally look like that. The shape of your mountains are very naive (for lack of a better word) and look like pyramids more than anything.

I know.  I've tried so many ways though to do decent mountains in limited tiles (had a whole folder of mountain reference pics but I found it so difficult to develop a small but usable tileset of them that wasn't complex).   I have made those ones in the screenshot fairly pointy though but there is a flatter top tile that I use in various ways.  I kinda went with pointy diagonal ones in that shot because it's the coast and so it's like the mountain range's starting point.  Maybe I'll play around with them some more.  I've just had another idea about how to redesign the mountain tiles and may have a go later but at this point I'm kinda getting sick of redoing all the early bits for the nth time and I just want to move on to new things.

You got such nice and organic clouds, perhaps you can put some more work into making your mountain tiles more modular as well. Also I would make some tiles which would allow for overlapping clouds and mountains, both clouds going infront and behind them. This would add a lot of depth to your backdrops.

I like the idea of clouds in front of mountains but I can't see how that would work without creating a load of new tiles or deleting the sky colour from the cloud tiles so they can be placed over things (though I don't want too many tiles with a transparent colour as I'm not sure if there's a limit on things like that on a real CPC or not although I have realised I don't actually use that sky colour in any of the other tiles on that sheet so that might lead to something).

Also, I think at this point it would not hurt to make an own thread for this, instead of posting pixelart related stuff in the OOTT.

I'd rather not to be honest.  If it's a problem I just won't post them here in the future.

edit: replaced the screenshot with one I just took from the game now.  Got rid of the points on the mountains and the diagonal overlapping and tried to 'scuff' up the details a bit more using tiles already in the sheet particularly on the mountain on the left.  Think it looks a bit better and there's something else I'll try later. 

yay for more efficient tiling!

Needed to redo the cloud tiles in my game.  The old ones in the newer smaller tile size ended up being about 70 tiles just for a couple of clouds with hardly much variation at all and ended up seeing the same clouds over and over.   Redid them last night.  They're now about 30 tiles that are designed to be mixed and matched so can make all sorts of shapes and sizes of clouds (even gigantic cloud cover) with far less repetition and generally look nicer than the old ones.   Think I'm learning a lot working within these 'limitations'. 

Old cloud tiles at top, new ones at bottom.

(Personally, I find Captain Jack difficult to like, too. My libido disagrees, though  )

Heh, I don't mind him tooooo much (though I don't really wanna see him back.  He had his time, he even had his own show).
What annoys me most is the scarily obsessed Tennant fangirl/boys who seem to be fans of his rather than the show as a whole (as they only like it when he's in it and even petition for him to be the next Doctor.  Don't they get how it works?) and I've even had hate emails because I happen to have only one sprite of him (plus a variant) on my site but many of Smith (my fave).  For example one email said they'd close down my site, find my address come around and beat me with a baseball bat if I didn't sprite the Tenth in his tux.  I'd like to think they were joking but it just didn't seem it.  Very aggressive it was.   So bizarre...  Anyways it's my site.  I sprite whoever the hell I want.  (starts to pixel another Smith just to rile up those idiots... mwhaha)

By the way I don't think anyone's ever going to figure out the other connection between my character names.  Not unless you're familiar with late 70's US TV shows I suppose.   It's not important anyways.   There are some references in-game to other things too but I'll leave that to whoever plays it to figure out.

Doctor Who?  Nope.   There is some reference to Doctor Who in the game (the TARDIS is shown in this now somewhat out of date shot http://media.tumblr.com/d4887e23438f74218f64820d327c7733/tumblr_inline_mn2d3ljU6R1qz4rgp.png as a sort of easter egg which may or may not make it into the final game) but nope, the names have nothing to do with that show.   But another tv show perhaps...

Which 'visual details' do you mean by the way? Am curious.

Just been throwing myself into my project a bit to distract myself from some things.

The main characters of ‘Cosmic Prison Commando’.  Both were prisoners who survived the crash of the prison ship.  Both are playable but on different stages.  Jack is the ‘hero’ of sorts.  David is less so.   Their names actually do have some connection.  I won’t say what yet.  They both are trying to get to the same destination though David is also more actively trying to sabotage Jack’s attempts to get there.

So yeah...