Big thanks for your valuable feedback! I'm not currently actively developing this game further, however I'm considering making a small update with various fixes I've run into while working on improving the codebase for use in a future project. Your suggestion for the toggle aim would fit in there perfectly! I'll definitely consider it. I've been trying to add vehicles as well, but in the current situation I wouldn't expect it to happen. However, I'm working on new game, which is yet unannounced, which will definitely feature ground vehicles!
Check out my devlog to stay tuned! Thanks again your great ideas!