So, after chatting in another thread about my love for the Apple II, it got me thinking about what Apple II or other early PC games would make fun conversions to PCE. I'm thinking more basic action games than RPGs and whatnot, because they would conceivably be easier to handle code-wise, much like the early arcade titles Arkhan and Touko favor. Here's what I've identified as good candidates so far.
Lode Runner: Yes, the PCE already has a version, but it's heavily altered. The original has a 28x13 grid for more complex levels. I think it would be fun to try to adapt that to the PCE with a more modern aesthetic, though dealing with tile compositing might be challenging, since a nonstandard 10x11 tile size would have to be recreated.
Boulderdash: Much easier than Lode Runner. Basic tile-based game with rudimentary "physics". Movement is grid-based. Would be important not to smooth that out too much or the game would be too hard to control.
Choplifter: pretty simple shooty game. Has a lot in common with Defender in some ways.
Any other fun suggestions?