Some files are licensed under LGPLv2.1+. I suppose that upstream just
forgot to update them but you should mention them in your
debian/copyright. You can spot them with licensecheck. Moreover, the
sources include bitstream font. I don't remember the license but I
suppose this is not LGPLv3. You should mention it too.
In debian/rules, you should use "&&" instead of ";" (or unroll when
possible).
You should adapt your debian/watch to avoid to match development
version. Moreover, you should use mangle option to exactly match
upstream version (see man uscan).
I think that you should fix this lintian warning:
I: salasaga: arch-dep-package-has-big-usr-share 1028kB 75%
(you can get it with lintian -viI salasaga_0.8.0\~alpha3_amd64.changes
There is also a missing manual page for /usr/bin/salasaga_screencapture.
Don't you forget to ship salasaga_keycapture?
You should not ship BitstreamVera but depends on it instead.