I just played through the demo at one go. In ZDoom. And I was totally totally liking it.
Visual and design style is surprisingly similar to Wrack's :) But aside of cartooniness, it's also even more elaborated and extensive, since Doom engine allows for it without lagging. The graphics are awesome, and even though they're simple, I imagine it must have taken enormous time and effort, since there's SOOOO MUCH of those textures and sprites with all angles. The result is fascinating. So many of new enemies, which are actually different in their behaviour from the Doom ones, but are still somehow basic, I mean not overpowered. Which makes for bigger and more intense encounters, and you use them often, and well. Gameplay is balanced really well, leveldesign is great, I like how every of the demo levels has different atmosphere (specially the last stands out). I like how the enemies varies in behaviour, for example how the purple cone "chaingunner" has low pain chance which itself makes him much bigger threat.
(Did I notice correctly that the cylindrical-like robot repeatedly firing green pulses, doesn't face the player before it starts firing (but he stops already)? Is that intentional?)
The weapons are great too, except just a few minor things. Shame that the "Dozi" doesn't have its own ammo counter on status bar. I noticed that, it was just my feeling and it may be objectively false, that the dual Paint guns are a better choice for combat than the chaingun-like projectile firing weapon in slot 4. Hitscan weapons are generally more useful than projectile ones, plus I felt the chaingun consumes ammo faster (a couple of Paint shots consumes only one ammo point) while each of its balls doesn't deliver greater damage than a single Paint shot, maybe even less. You know Batman Doom? Its Batarang weapon used the same ammo as chaingun, but fired projectiles. These projectiles had much more power than a chaingun shot, but anyway it was sometimes better choice to use the chaingun, just because it was hitscan, (plus it was rapid fire, but I think the hitscan character of the weapon is more important). I'd recommend you to make the chaingun (weapon 4) slightly more powerful.
I'd like to see this a Cacoward winner, only one thing remains a mystery and I'd like to hear from you - of which year? :)