I'm using the 64-bit .deb package downloaded yesterday from Humble Bundle on my Debian Jessie-based distro (SolydX), 64-bit.
I can't install it because ia32-libs has no installation candidate. The issue is described in detail with terminal output here:
http://forums.solydxk.com/viewtopic.php?f=4&t=6093Also see a paste of just the terminal output here:
http://pastie.org/private/ekdfbhlpddlpwejtfc6s5a#1,88Part of the problem seems to be that the libraries this package depends on have been replaced with multiarch system equivalent, hence the dependencies can't be met.