It is a modern remake/remaster of the original Flash game series by AntKarlov.
Playing a precise mouse-and-keyboard shooter on a touchscreen can be challenging. Use these strategies to survive:
Some specialized mobile web browsers integrate open-source Flash emulators like Ruffle directly into their software.
If you can safely acquire the original .swf (Shockwave Flash) game file of Zombotron 2, you can use a standalone emulator.
Zombotron 2: Time Machine was originally a free Flash game supported by ads on portals like Armor Games or Kongregate. Since those portals no longer support Flash, and the developer has not explicitly released the game for Android, downloading the SWF for personal offline use sits in a gray area.