I looked around a bit, and apparently, this isn't directly related to WADF or the other games by that author. The games were made with a program called Multimedia Fusion, which apparently triggers false positives in some anti-virus programs.
Here's a thread on the WADF forums discussing the problem, with most people blaming MMF, and
here's a thread on the MMF forums about the problem. One person emailed AVG tech support about this, and was told that it was indeed a false positive, and the next update to AVG will fix this.
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