UPDATE: Game was bundled in groupees bundle on 14 May, a mere 9 days after release. I don't feel glad I supported this by buying it on initial release on steam. I feel like I've been kicked in the teeth by Oryx.
I really want to mark this neutral- half way between recommend yes and recommend no.
First of all, this game apparently used to be free on the web at the official web site, but now it links to steam instead when you click to play. The game is available here though:http://jayisgames.com/games/famaze/
...and playing it will give you the best idea of what it's like.
The good parts are that this is a charming, simple game with pixel art sprites, nice chiptune style music and a polished feel.
The bad parts are the complete lack of options which means you have to play in a window approximately the height of your desktop (at least on my 1920x1080) and a third of the width. You can't redefine the keys, which is unforgivable. For the record keys are cursor up left down right, 1 and 2 to use objects, m for map, space for pickup, q to quit and esc to cancel.
It's also a bit weird that Oryx are using their own sprite set which has been sold to a lot of developers, making their own game look generic in the graphics department. It's also a bit disappointing that this, unlike the other games using the sprites, isn't a true roguelike because you're not moving freely about on a 2d grid with monsters chasing you and so on. If anything this is a "1.5D" roguelike game.