Thanks for the feedback! It really helps in finding those bugs. Your idea of having a single save per level is interesting. It made me think of games in which saving can only be done at particular objects however, maybe I could add an item which allows you to save. Therefore, it will encourage exploration at the same time. In the next update I should have all the bugs you listed fixed to the best I can. I also plan to add a settings section in the pause menu which will show the controls as well other settings such as sensitivity, gamma etc.
Thanks again for the feedback, have a nice day!