x2yzh9> Actually that's exactly the plan ^^
To be more precise, i have sort of "technological ages", although it's more of the way i organized the core of the tech tree and decided to pace the game,
not stuff à la age of empires. There are 5 technological levels, and although there will be more and more stuff in each of them, you will still need to reach the 3rd "level" to be able to leave your home system. The first alpha release will feature only the first level of technology, which is about making steel, crude plastics, basic electronics and glass,build basic infrastructure, and also producing food, water and oxygen for your colonists. I won't spoil what you will find in the next tech levels, but suffice to say that you won't get the hyper-propulsion right away :p
_DivideByZero_> About game maker, i think it'll be ok, because most of the things will be static and i'm running it at 12 steps per second, also i'm trying to make it so that things like production and consumption are centralized around bases (your first base is the landed colony ship), and the production update is every 4 steps (3 times per second). Things could get out of hand if players built really massive and unoptimized empires, at this point i might migrate to something else if i feel there's really a need to.
If you want to make art assets, you're welcome to. Right now i'm using Paint.NET, which is surprisingly good. The first sprites i draw were really basic (colored squares with a text), but when i need to make new ones i'm now being a bit more creative. For instance, here is the last sprite i draw (the main base) :

The nice thing about game maker is that i can easily replace the current sprites with something more inspired, so if you or anyone else is interested in drawing them, send me a PM and i'll give you a list of stuff you can draw.