Okay, I can already tell you two things that need to be corrected. First, there needs to be WASD controls, since it's much easier to play with WASD and mouse than it is with arrow keys and mouse. Secondly, get rid of the random death effect from ? blocks. It's just plain frustrating.
I'm kind of disappointed that it's not possible to get bonus points for reaching the goal under the specified number of moves, or making more pieces than necessary. Since going back a step and making an inferior cut is so easy, it feels like unnecessary extra work just to do what the game tells me.
I kept decrease the number of clicks into the negatives, and I could still win just by clicking on the red ball with my first click. The levels stop becoming harder, and if I wanted, I could keep doing it forever.
Apparently, in Level 6, the yellow train must stop at the blue station, and the blue train must stop at the yellow station. Do I even need to explain how stupid this is?
It isn't impossible to get that one heart in Level 17, but you have to tap the up button with exactly the right timing to make her jump quickly enough. It's much trickier than anything else in this game.
It would be a lot easier to comprehend this maze if we had the option of rotating the view to any one of the six orthogonal directions (North, South, East, West, Up, Down.)
When a game wears your patience so thin that you give in and refer to the walkthrough for the last level, and you don't feel the slightest bit of guilt afterwards, AND in 90% of all games you abstain from using a walkthrough... something has probably gone wrong.
As soon as I learned that one of the victims was a Nazi officer, I knew right then and there that someone was going Inglourious Basterds on their asses. The last 3/8ths of the game was just me getting the evidence to confirm it.
One thing I cannot stand about most Nitrome games (which the micro-games are thankfully exempt from) is that if you die even once, you lose all of your points. It's especially bad here. Get hit by one enemy, and that's the end. No extra lives, no continues. That score that you so lovingly grew and tended to is trampled into the dust by the unforgiving foot of Nitrome. And as you fall to your knees, trying in vain to salvage what remains of your precious points, you ask yourself "What was it all for...?" Nothing. It was for nothing. There is no honor to be had in this cruel trial we call life. Only the desperate attempt to flee the inevitable... and nothing more... (I don't like having my score erased every time I take damage, is what I'm saying.)
"We still have things to do, and it will be both taxing and confusing to you. Now, give me the bird." Oh, if only the game would let me, I would gladly give you the bird, lady. I would give it so hard.
It turns out that the "invisible blocks" are actually toggle-walls, that can be turned on and off on certain levels by sending the knight through switches. I do have to question the design choice to introduce the "invisible blocks" a full 8 levels before the level with the switches, though.
When people play games, they generally want goals that are desirable in some way. I don't think serving an obese kid that's too lazy to get his own candy really counts as a desirable goal.
Well that was boring. There's no challenge in this game. You can't die, no matter how may times you're hit. You can kill all the enemies just by holding the up and left keys the entire time. And the only rewards are occasional palette swaps and a trite 'story'.
The runner needs to accelerate to top speed more gradually. Restart should be mapped to the keyboard so it's not as easy to accidentally press. Also, the tracks should start out with gradual curves and wider paths, and even in the later levels not be completely dominated by hairpin turns. Finally, I'd like to see the ability to brake/drift; holding the right mouse button would brake, locking you into your current running direction while still allowing you to look around. Basically, this would allow you to "drift."
 "Squarelaxy"){kind=icon}
 "Divide"){kind=icon}
 "Fake Hard"){kind=icon}
 "Happy Train"){kind=icon}
 "Dropped the soap"){kind=icon}
 "Jim Loves Mary"){kind=icon}
 "Layer Maze 4"){kind=icon}
 "Scene of the Crime: Dream of Murder"){kind=icon}
 "Papa's Hot Doggeria"){kind=icon}
 "Bad Ice-Cream 2"){kind=icon}
 "The Grey Rainbow"){kind=icon}
 "(Don't) Save the Princess"){kind=icon}
 "Hungry Grew"){kind=icon}
 "Color"){kind=icon}
 "Run Run Run"){kind=icon}
Actually there are WASD controls, Arrow keys were added just in case someone likes them.