Definitely one of the more entertaining games I've completed, however it does suffer from the mid and late game becoming incredibly easy because you outscale it, as well as the late game becoming slow because enemies have a lot of life yet you are completely invulnerable making victory a slow, yet foregone conclusion. I cut the devs a fair bit of slack on balancing here as they didn't have that many testers so it's likely these problems persisted because people didn't find them, not because the developers were lazy or incompetent or anything like that. They also still did a better job than most for the following reasons:
Status effects are actually useful! Instead of just spamming damage and killing the screen before it moves, stuff like damage over time, buffs, debuffs, stuns, etc are actually useful and worthwhile uses of actions. In fact just spamming damage is considerably slower and less effective than say, stacking bleed/burn/poison.
Damage over time has some unique mechanics. Basically it deals damage every unit turn and every global turn, so fast units are hurt more by them and because they decay slowly (burn/poison) or not at all (bleed) and come in non trivial quantities doing something about them is an important part of the game. Also, because stuns prevent unit turns, they do reduce your damage. Normally this would make stuns useless, but since the alternative is stunlocking fights because Action Economy it actually works out favorably.
Non combat mechanics that are actually useful and not just a gimmick or a noob trap. Sure you can focus purely on combat skills, but then you miss out on a lot of stat buffing items (Knowledge of Herbs), starve crossing certain terrains (Knowledge of Terrains) and on the higher difficulties at least waste absurd amounts of resources or even die from traps and locks. There's also more direct utility, like Mercantalism (every item costs less and sells for more), and the identify skill I forgot the name of (saves money and time).
It's perhaps the only game that does survival right despite not being a survival game. People don't starve after a few minutes after all, and so even the highest difficulty lets you carry 4 days of food + however much you find, hunt for, or carry in the form of cereal plants. It's still a factor, but mostly it just makes rest spamming tedious which, given it's a pretty degenerate and noobish "strat" is a good thing.
All those are game mechanics related because that's the primary thing I look at. If a game has weak, boring, or one dimensional mechanics I'll lose interest very quickly. I have roughly... 600 hours between the GoG and Steam versions and am not completely done yet so draw your own conclusions from that.
As for the other stuff...
The music is pretty good but you'll probably get tired of the normal battle music eventually.
The story is merely ok, and is made infinitely better by reading all of Grillin's lines in your choice of a shrill female voice or Krillin's voice or both.
The graphics are fairly good. Some people complain about the 2.5D, but that's a pretty silly complaint. Considering it was made on a 10k budget they really made the most of what they had, even though yes the animations are sometimes clunky.
The whole navigation/exploring element is very good, they don't call him Gaulen the Explorer without a reason. My only complaint here is that it's not at all apparent where you can and cannot walk between gaps in the trees, and since there's often secrets hidden in forests that results in a lot of tree humping. No wonder people commonly question the main character's sexual preferences.
The only thing the game really needs is balance/pacing work. This is actually something I was working on, though progress on that particular project has been paused for a while because of lack of outside interest and because I was busy/focused on other things.
