I'm happy that you like it, you really gave me a boost to keep working on this game! I also grew up playing the 3D era GTA games, so I may have got some inspiration from there :) I like your idea of cactuses shooting needles, I also have a completely round cactus in mind which will roll towards the car and explode on impact, so there will be definitely more variety of the enemies.
There's also a bug I couldn't fix yet, sometimes a cactus will stay in its attack state even when the car is too far away to be hit and it will just move towards the player hitting the air. I just call these raging cactuses, maybe I'll leave it this way even if I find the reason why it happens, just for the fun of it :>