Be careful with speed
There are a few options you can select as you play along in Armory & Machine 2. One of these is being able to improve the speed of The Machine. This will allow you to get the Power to the next level a lot faster. The meter goes to a certain number like 100 for example.
Fill it up 100 times, and you'll be able to proceed further. You can continue to upgrade your speed to make this process faster. However, try not to go overboard with it, because if you upgrade too much, too quickly, it will restart the meter or lower it dramatically and when you need to fill up a high amount of times, that's the last thing you want.
So just kinda ride the wave with the speed you have. You can increase it, and it's encouraged, but just be careful. Don't let your impatience get the best of you. In order to get a good flow going, you need to hold down on the screen and keep your speed meter on the bottom of the screen steady. But you can crank that one up to the max to get the full speed of the Power meter that needs to be refilled a certain amount of times.
Really, balance a bit of pace is a big part of this game. Just be smart with how you utilize the speed. Don't let the speed demon in you take over (I know, it's all of those times you've played Burnout or Forza).
Have fun deciphering the story
Believe it or not, even in this minimal game, there is a small story element to it. You'll see different sentences pop up as you upgrade The Machine or do other things. These don't appear all of the time, but they slowly tell you what's going on, or at least leave you to hypothesize.
Remember, there is no tutorial or guidance in this game. So you're left sort of thinking to yourself as to what's really going on. All you know is that you're in a room and are trying to establish a unique connection with The Machine.
These dialogues quietly paint somewhat of a picture for you despite how confusing it may seem. It's always fun when a game leaves you to wonder and has you asking questions. If you've played games like Journey or Bloodborne, then you'll know what I mean when I say you'll have plenty of questions. At least this little story can let you come up with your own thoughts and make you want to play more to understand what's going on.
Craft when you like
In Armory & Machine 2, you can craft and the ability to do so should be available early on. Crafting will allow you to expand The Machine a bit, and do a few other things. What you can craft will expand over time. You can also give it a little boost in speed after crafting.
However, be careful when doing so, because it will cost you some Power. So if you're on 500 Power out of 1,000, there's a chance you'll lose a couple 100 of it if you craft.
That said, if you're at 700 or 800 out of 1,000 let's say, then dropping a couple hundred shouldn't be too devastating. You can go ahead and take advantage of crafting as it can be helpful. Just remember to spend wisely is all and you'll be grand.