The Good: Mindless carnage, lots of weapons, pretty good time waster
The Bad: Sticky keys, weapons sometimes not working when picked up, locked up my browser on the last level.
The Ugly: Unnecessary links are unnecessary. Put links on the menu or something not all over the game. Links are important for generating dev revenue or sponsors yes but putting them everywhere so much that they can interfere with normal gameplay will lower the game's rating and make you look like a tool.