The "problem" with Tower Toppler is that it was programmed using the maximum resolution available. To achieve this, they had to reduce the color palette and on-screen colors to 2. Also, this game was made for the XEVGS, some of the new games for this machine won't work propperly in older machines due to memory mapping, OS incompatibility, RAM requirements, Video chipset, etc.
Another game that has the same artifacting problem is the original 1982 Choplifter, also from Broderbund.
Is there a master list of "artifacting" games?
By the way, I have played Tower Toppler on the Atari800DC emulator for Dreamcast and it plays quite well.