Let's see... super fun gameplay, nice graphics, great sense of humor, brilliant voice acting... 5/5 without a doubt! Just wish that the game is a little longer...
Badge of the day should be one that doesn’t require a lot of effort, skill, and most importantly hella lot of RNG because of poor game mechanics. Clearly this medium badge is the worst candidate for badge of the day.
How to get "unlimited" money: Refresh the page immediately after upgrading the penguins. You'll keep your money but you'll also get the upgrades. This can save a lot of grinding time. NOTE: This only works on the penguin upgrades, does NOT work on the general upgrades (speed boost, life boost, extra penguin, bombs).
Click on "Cinematic Mode" on the top left of the game screen to enlarge the screen, which helps with the "cursor went out of game screen and therefore slash did not happen" problem. It doesn't get rid of the problem completely but at least it helps a little.
Principal: "We need money for the academy. What to do? I know! Let's just send a bunch of inexperienced students to earn money for us! I'll just sit in my office even though I know I'll be able to kill the monsters in one hit. Great idea!"
The game and badges are working (I played on Chrome), but you have to wait for a while before clicking "PLAY!". If it doesn't work, refresh the page and keep trying until it works. Instructions are unclear so here it is: arrow keys/WASD to move, left mouse click to fire, spacebar to drop weapon, E to switch weapons. Medium badge is actually easy if you follow the top comment (trust me, I suck at games like this and I hate all Thing Thing games but I still got the badge). Be sure to keep Grenade Dart Launcher because once you heal up in the lower left corner of medium lab map, jump to the top and fire it 3 times towards your enemies then jump back down, and you'll get multiple kills worth a lot of points! If enemies come into your healing spot, switch to another weapon and quickly kill them off. Collect ammo just above your healing spot as often as possible to recharge your Grenade Dart Launcher. Good luck!