I just tried to write individual programs using mDrawBot Kit with mBlock.
Nothing worked like it should. Analysing the generated Arduino Code I found that there is a Mistake in one of the libraries.
When I, in mBlock, insert the Block "Set Delta to atan of x/y"
it will, in Arduino Code, translate to delta = atan(angle_rad*(y) / (x));
But it should translate to delta = angle_rad*(atan(y) / (x));
I get the same issue using acos and asin functions. Fixing is only possible over the Arduino IDE.
As this is very inconvenient I hope you find a way to update the library.