The Ins key does nothing...
There are two colums of keys: 3,w,s,x,Shift(Left) and 0,o,l,!,@ which have very little backlight.
A CapsLock-like stickiness of Ctrl and Blue could be useful, maybe exclusive (one cancels the other) ?
In the Settings app, a keyboard tester could be nice. Show a map of the keyboard, light up the keys as they are pressed