Still playing through the game, but it has a couple of flaws that deserve a second look before a buy.
The game tutorials and menus are full of typos and are occasionally incomprehensible. This would be more of a problem if the game's mechanics weren't almost all re-used from other tower defense titles. It isn't hard to figure things out, it's just that the game doesn't really explain them.
If you've played Sol Survivor or Prime World Defenders, you've seen everything the game has to offer already. Except neither of those games was restricted to five turrets. You get a slow turret, a generic shoot everything MG turret, AA turret, anti-armor, and a mortar (AoE) turret. The "research" is ticking boxes off a list for an undisclosed "attack boost" on a specific turret or unlocking a randomly activated special ability. Upgrades on turrets are perfectly linear, with no real encouragement to do anything other than front-load your upgrades for maximum efficiency.
In fact, the XP system on upgrades REWARDS stale front-loading.
I'm listing this here not so much as a flaw as a suggestion to look hard at the screenshots of gameplay. The graphics aren't fancy, but they are serviceable.
4) Personal Beef: Lack of Originality
There are plenty of TD games out there. Some are good. Many are not. This one does not really introduce anything new to the formula, and to me, that is very disappointing. Defense Grid did basic TD mazing best, Sol Survivor had a massive variety of turret types and active abilities, Prime World had its odd CCG-esque collectibles. Nothing in Rush for Glory makes me want to play it more or differently, partially because there are so few options to begin with.
Things the game does well:
Speed bar is really well implemented. Admittedly I run the game on full speed more often than not, but that's a personal thing I do in most TD titles.
I'll be putting in more time with this later, perhaps, and will hopefully come up with reasons to change my recommendation, but so far Rush for Glory isn't filling its price plate.