I mean, taken in isolation, it's not a bad game. The levels are quick and concise; it's literally just a matter of letting gravity do the work for you, and strategically killing a few monsters along the way. The levels are also procedurally-generated, which means every playthrough is different. Beyond that, different heroes have different strengths, and you can upgrade characters along the way. Rounding things out, the characters — to say nothing of the game world in general — are adorable without being too cute. The thing is, Vertical Drop Heroes HD doesn't exist in isolation, it exists in a world where other games do the same things, and do them better.