I'm gonna say it: Nodebuster clone, but I personally enjoyed it more than Nodebuster. 1 star docked for some pacing issues, some sections stretch on a little too long, and there is no reason to complete all the quests (you unlock quests later), I completed the game with some quests to kill X of this enemy still only 10% done, and that's after maxing out every upgrade. I believe the game said it took me around an hour and 30 minutes to beat the final boss, but I spent at least...10-20 more minutes afterwards maxing out the last upgrades, so that should give you a rough idea of how much playtime to expect.

As far as what I actually enjoy about it, it's just, generally satisfying. Upgrades feel meaningful, (although not all of them, and some are overpriced, but many feel like large jumps in power,) the scaling scales, you unlock some extra mechanics as you go...specifically quests and equipment, quests are do X thing for Y amount of currency Z, and equipment adds random drops you can equip for stat boosts, including merging items to rank up their rarity, which makes the numbers bigger. No upgrades affect quests other than unlocking them, whereas several upgrades improve equipment drops, inventory, and upgrade slots. You also have various elemental attacks which all go off on their own, and you get a little damage readout showing what attacks are doing how much damage...

It's all just very passable. Little tedious at parts, but I found it satisfying. You kill a lot of enemies for a ludicrous amount of cash, you go up a level and get stomped, you buy a bunch of upgrades across a few runs, you get strong enough to progress to the next tier, rinse and repeat. Basic but satisfying, if a little filler-y in parts. It reminds me of the experience of eating canned chicken noodle soup, in that way. Gourmet? No. But not offensive either, and still satisfying regardless. 4/5.