VERY impressed by the no-code node editor system although I found an exploit - more on that later. I like the graphics, although the health bar should be smaller and directly above the virus to make clear what it is, at first I didn't notice it. Also the root of the tech tree should already be unlocked because I didn't notice (again '-_-) and I immediately tried to go to attack and defense and I couldn't get it and I assumed there was a bug (because I forgot to unlock the root -_-). But that didn't matter because I found an exploit to easily beat the game before I realized my mistake.
SPOILER + EPILEPTIC WARNING:
so the exploit is that it's possible to chain multiple paths. The simple example is to use the base node, an attack node and a defense node, and to connect all the combination of input/output. The result is a flashy unstoppable virus that spams attack and defense