I thought it was pretty fun, but I don't like how it routes you to a different website after a few levels. If your putting it on Newgrounds, put all of it on Newgrounds.
The game itself was entertaining to a point. The concept is interesting but the mechanics are stale. The only new thing I saw was the stationary cards witch did make it a little more challenging but I was expecting new cards to show up for special effects or obstacles to block the cards. As it stands right now it's fairly simple.
And above all else the the auto link to sillybull is annoying. If you're going to upload the game then do so, don't try to sneak in your site in game. If I felt so inclined I would have sought it out via the links.
After completing level 10 clicking on the next button opens the Silly Bull site in a new tab instead of going to level 11. Other than that a nice game.