Desperately trying to steer I find myself clicking outside the game window often, this, of course, doesn't register as a click and leads me to crash.
A bigger window to click in would be nice, some decorative borders around the field or something of that nature.
Enjoyable game.
Seems to run a bit slow on my laptop, have to wait too long for things to fall, watching myself jump through the air in slow-motion, or sitting on a block waiting for the "powerups" to wear off. I also choose the right door and now I have to replay everythng? This game's idea seems okay, not the most original, but the pacing is way off. Makes the game feel more annoying than difficult.
Very difficult indeed.
I'd suggest changing the colour of correctly-connected nodes to make it easy to see where more work is needed, it's not really fun to need to recount all your nodes manually to see which is off, computers are way better at counting anyway.
I also like to order the nodes by number before starting to solve it as it is rather difficult to work in that mess they start out in. Maybe automatically order them at the start of the game instead of dropping them on the field randomly.
The sounds in this game remind me of those DOS games I used to play back in the day. It may come across as tacky to some, I don't know who your target audience is.
Instruction could be more detailed.
Maybe an interesting idea to expand your game or make it even more difficult: Have multiple kinds of nodes that can't connect with each other; nodes that can/must connecct to several kinds of nodes. In other words, add more diversity, diversity is good and interesting.
 "Age of Colors"){kind=icon}
 "Rotate the Maze"){kind=icon}
 "Incremancer"){kind=icon}
 "Pixelo"){kind=icon}
 "Aviator"){kind=icon}
 "The Square Beta"){kind=icon}
 "Node Connect"){kind=icon}
 "Coinbox Hero"){kind=icon}
 "Effing Worms"){kind=icon}
 "Extinct! Are you smarter than a plant?"){kind=icon}
 "Vox Populi, Vox Dei(a werewolf thriller)"){kind=icon}
 "Viricide"){kind=icon}
 "Pandemic: American Swine"){kind=icon}
 "City Smasher"){kind=icon}
 "- Spin Sprint - {Orange}"){kind=icon}
 "Dreams"){kind=icon}
 "Super Crazy Guitar Maniac Deluxe 3"){kind=icon}
Thank you!!! I'll make a fix today. Together with a brains for bots and some other stuff that I've managed to complete.