I'll post it again because why not and the game could use some more attention. Which I ain't saying 'cause I got the key from the dev, I honestly think it's pretty great and also impressive for a one-man-joint.
Reading the description would've helped but I didn't expect Vertical Drop Heroes HD to be a rather intricate Rogue Legacy-style game where you can choose between heroes with different abilities and level stats up permanently, I thought it would be something simpler.
Don't know about the longevity yet (played 1hr) but compared to Legacy I like the short levels with a mini-boss at the bottom instead of having to grind a while before getting somehwere. Here there's instant gratification including temporary level ups you lose after dying and permanent upgrades that are purchasable in the levels and in the hub with gold (which you only lose between runs when rerolling the heroes offered). Keys are important as well as they're used for multiple purposes like opening chests, removing obstacles, freeing computer controlled helpers or even bypassing a mini-boss with five keys. And there's more, for example short quests that get you XP, water that flows around when blocks are destroyed, the possibility to warp back to the top and lots of tombstones which e.g. spawn artifacts but also enemies when activated. Enemy variety is high, graphics are good enough for a 5 game and the artstyle reminds me of Scribblenauts (in a good way).
Almost forgot another nice touch, you can play as 'pacifist' and gain more XP by picking up symbols that disappear after killing one enemy (kills by ai companions don't count). Also levels have modifiers, enemies with less HP but more damage, two bosses instead of one etc.
A few cons: No online coop, only local and LAN. Sometimes enemies spawn right into me and when the health is low which can lead to an unavoidable death. Or there's a bunch cuddled together and it's impossible to fight them without losing a lot of health (avoiding those mobs is an option most of the time). Lastly the controller config needs work due to a few inconsistencies and bugs and button icons would've been appreciated. Overall the controls are fine though, very responsive.
So thumbs up from me so far, a pleasant surprise.