There was also a version of Lemmings on the HP48 calculator: <https://www.hpcalc.org/details/530> (incidentally by the author as Alpha Waves, a.k.a. Continuum)
I never quite got into Lemmings (Worms was more my thing) but I love these pieces of software for limited hardware of the day such as Palm, Windows CE, or Newton.
Edit// Oh this guys profile is full of cool Palm OS stuff.
Aaron was/is quite the coder. I used to belong to a group he was in as well. Learned a lot. Also took it as a challenge to crack his palm programs :) and he learned techniques to thwart us lol.
I really liked the palmos c libs, MemCopy and WinCopyBitmap just reads so much nicer than memcpy and memset. Also UInt8 and UInt16:)
Those were fun times, when 16bit ints were enough for everyone (just kiding;)
Edit// Oh this guys profile is full of cool Palm OS stuff.
Fun guy.