This is obviously a very early version of a game and it is actually fairly addicting. However, it has one fatal flaw. I should be able to either press the space bar or the "r" key to restart the game. Having to completely take my hands off the keyboard, and put them on the mouse destroys the flow of the game if you want to die over and over to beat the game.
It really disrupts the pacing of the game. If you added this one feature it could help the game out a lot.
Some tips on farming for points (if you happen to be in the unfortunate position where you are forced to do so). The very first level on insane is the best level to farm for points. You can do it very fast and get around 100 points every time with little effort. If you click where the replay level button is going to show up, you can replay the level without the animation fully ending, allowing you to do it a little faster.
Pretty fun game. I wish the leveling up went faster though. By the time I finished the game, I still haven't come close to unlocking half of the material. I can't be bothered to keep playing to unlock the stuff after I beat it because there is no incentive at that point.
This game would be much funner if you actually felt like you were progressing as you got better cards. I was pumped when I got my first 4 circle card, only to find out that my enemies now have 1000 of them. This just frustrates the player and forces more grind than necessary.