Let me just sum it up:
-The translate tool doesn't work properly, clicking the arrows generally results into selecting the object behind it instead (like 9/10 times)
-Use alt or CMD instead of control for the camera movements, control+scroll results in the OS zooming in and it's just not a great position for a button
-Try not to require the middle mouse button, use LMB instead
-Use backspace instead of delete so it can actually be used with one click instead of having to press FN+backspace
-No CMD+Z possibility?
-No Copy/Paste?
Anyway, this looks like a great tool in progress, keep it up! It just feels more like an alpha than a beta, though, and it's not really usable.