maybe just going with standard characters might be easier <>^v not as nice. But there should be less issues.

-----------------------
an other idea would be <>ΛV Λ=&Lambda


------------------------
or maybe ← → ↑ ↓ might work better, the other issue with using special fonts is that it could happen that the font is not installed on the other PC

for the arrows it is &{char}arr;
where {char} is
u=up
d=down
l=left
r=right

-------------
note 1) don't forget the ; at the end of &Lambda
note 2) it is case sensitive so &lamda<>&Lambda