Thank you for your detailed review, I'will definitely release a HUGE update for this game based on the feedbacks, and your review and suggestions helped me an insane amount.
With the suggestions of custom font, loud menu, working buy buttons in-game, rebalance, and better graphics I can only agree with. I will make them for sure in the next update. Also, I will try out Inkscape, thank you for the recommendation.
For the rest: you can already move the camera change the distance between the camera and the ground by holding the left shift and scrolling with the mouse. I think that fixes that problem, that the enemies see you before you see them, though I accidentally left its default value pretty low.
The disappearing objects are a game feature: they became invisible in smoke and in the forest. I didn't have time to make this smooth before the deadline and I don't explain it anywhere so it might be confusing. Sorry for that.
Thank you for playing and rating my game.