Perhaps you could add a way to increase atk speed by a %, or just a #, w/e you see fit? perhaps add it as a stat to other items as well? I also feel like a beastery (to view all the monsters defeated) would be nice but not necessary. I'd also like to see the option to fight stronger monsters, or perhaps something stronger at least and less random
The fact that 2 electric cars can ram you, completely disable all control over the vehicle, back up and ram you again until you're dead is just a beyond horrible design.
Another suggestion, as many have said many of the lesser ores and mainly bronze/coal end up piling like crazy and just sit there. Perhaps we could convert them to other ores for a price with no limit. this'll give players a reason to keep them at all late game. Please consider do something about the ores stacking up
I think there should be more uses for emeralds/gems, one thing I'd like to see is a way to hire mercenaries after you've unlocked that weapon user because often I have a epic weapon with all the parts but no one who can use that weapon comes by and I end up losing etc. I think this'll really give you a reason to collect as many gems/emeralds as possible.