While I guess the usual explosions are fun and the moving turret plays a little different from the prequels... Stuff like enemy antimatter shots, singularities, and especially flying off the screen at superspeed (making it some form of confirmed death) are really, really annoying. Its still fun, but with so many one hit KO things around, it'd be preferred if you could at least save your upgrades. Re-upgrading 10 times over is just a waste of time.
Geez, if you want to make people pay for a game, at least make sure it doesn't look like a half complete job or something. Not so much that it "isn't for everyone" but its genuinely not good. The damage bugs if a skill and attack hits it at around the same time, the display bugs if heals and attacks hit at around the same time, the map is worthless, the quests don't even track. I really wonder why so many people like it.
How the hell do people find easy mode too hard anyway? O_o I mean, easy mode worked pretty well for my quick-fix game session. Intermediate murdered me for that, but eh. That's whats the difficulty's for. >_>
Typical platformer, but seems pretty polished. Nifty little things like the hitbox for the spikes being slightly smaller than the spikes, whee. I enjoyed playing it.