Logic Gates - Electronic Simul

I like how the app works because it lets me to create my own integrated circuits (IC) and use them to create even more complex ICs. So I thought it's worth buying the ad-free version to support the developer and I did. Though, the only things I want this app to have are (1) feature to export diagrams as images like png, jpeg, etc., (2) feature to copy/paste circuits/gates and (3) be able to add gates quickly or add multiple gates at once.

I can finally make logic circuits like computers parts or computers them selves, but so many bugs like a and gate working without any inputs on and many others, so making a computer is probably impossible, if there was a copy paste also it would be nice, even with these draw backs, 4 stars, just if there was copy paste option i would put 5 stars and fixing and gate also would

the game seems great.. until you get to level 19 and the logic becomes faulty (help!) EDIT: thanks for the quick response, I spent a long time on the level because I mixed up the or and xor gates in my head which led me to believe that the game, rather than my own thinking, was faulty . Apologies for the inconvenience, I've now corrected my review to five stars which I think the game (and also the customer support) deserves. Thanks!