I hope that you're not spending a lot of time typing in Your Sinclair programs, as all the Your Spectrum and Your Sinclair type-ins (apart from three impossible ones, plus Font Designer) are already done at TTFn.
The reason that Font Designer (YS Apr'86, a MegaBasic program) hasn't been done is that the characters printed in the strings at lines 145-152 include several which don't appear on the Spectrum keyboard. So there's a challenge for you.
There are a couple which have been done but don't work properly.
Miner Mania (YR Jul'85) - the data for some of the levels wasn't printed.
Mystery Box (YR Apr'85) - the program had bugs in it and the "corrections" printed in a later issue didn't fix them.
Comments
The reason that Font Designer (YS Apr'86, a MegaBasic program) hasn't been done is that the characters printed in the strings at lines 145-152 include several which don't appear on the Spectrum keyboard. So there's a challenge for you.
There are a couple which have been done but don't work properly.
Miner Mania (YR Jul'85) - the data for some of the levels wasn't printed.
Mystery Box (YR Apr'85) - the program had bugs in it and the "corrections" printed in a later issue didn't fix them.