Absolutely awesome game! The train upgrade system is insanely fun—felt like assembling a rolling doomsday machine, and I loved it. Would be great to have auto-firing wagons with unique passive effects, adding more strategic firepower. I did miss a volume slider—had to nuke the sound from orbit (browser settings saved the day). With a few new wagon types, a visual refresh, and some killer music, this could easily go nuclear on the Play Market charts!