Great arcade game. I like games that manage to deliver a large amount of excitement in a short amount of time. Almost as good as Super Gravitron.
I'd like to play this game on a dual analog gamepad. Mouse and keyboard are uncomfortable - the controls may be the game's major flaw.
Feoren: afaik computer enemy plays the same cards as you (so you can't trick him by altering the deck).
Acceber: "1 card per turn" rule is very essential - it (as well as the limited resources) makes you concentrate on choosing the most necessary card for the moment and also gives some time for recovery to the player with less workers.
gamerwhit: At the last boss, there is some dark debris which can't be destroyed and looks like it's in the background - just try to avoid it.
As for the game, it has great music, graphics and atmosphere for sure. I agree that the gameplay is not what I expect from a game today but it's a part of the retro feel. Umm... 4/5
Multiplayer is certainly a great addition. I'd prefer seeing my hand during the oponents turn though (for tacticising - it would make most turns take half the time).
Custom decks are nice as well.