I tried normal and phew, this certainly was hype: I was followed by a conga-line of minotaurs to the throne with 6hp left and no cure herbs. Thankfully you heal between maps, so I actually managed to beat the general. 

 I'm not 100% familiar with this genre either, except literally 10 minutes of Shining Force 2 and the occasional aborted Final Fantasy Tactics playthrough. I think my first angle of going further here would be to add more units to control for the player, and not just an ally (unless that was the whole idea, one player character and the rest is all npc allies, I think that could work too with some tweaks and more focus on abilities maybe). Also, I think you already mentioned it below, but I think a tutorial could help as well, for example I didn't realized there were chests that could be opened (I went to one but must have missed how to open it somehow).

I liked the music a lot in this, the tracks were all great. And like I mentioned, it was very hype for me, it had me hooked, great job there!

I don't think I've ever played anything in this genre before so the UI and control scheme felt very confusing to me at first. I only used the mouse though because I don't know the default RPGM controls either. But after clicking around wildly at everything I got the gist of it. 

• No fullscreen option? Or option to increase the window size at least would be nice.
• The ally stopped at the entrance where the first skeletons are, I don't know if its intended or not.
• Opening the western most chest caused the one east of it to look like it was opened as well. But I could still go there and loot it.
• It doesn't seem all that interesting if you only have one unit, but I assume you'll have lots more later. So this would be an ok start.
• It seems a bit odd to me that you can't attack at all with a big mech if you break your weapon. I stopped playing while looking through the chests after a new weapon but got boxed in by enemies, whoops. I probably shouldn't have killed everything I saw I guess. 
• 

All in all it seems to work well and if you keep working on it could turn out good.

2)The UI was confusing until I figured out `Z` and `X` were select and go back. I would leave a "go back arrow" in every new window that opens.

3)I couldn't figure out how to attack the snipers, I don't know what strategy I would have needed to make it to the dungeon

Would love to see more of this, keep it up

I made it through the first map. It was really confusing at the start, because I didn't know that you are not supposed to control the titan mech, and have to dispatch your unit first.

I'm not really knowledgeable in the genre, but it seems like it's mostly feature-complete. Because of the visuals I got some RPG Maker nostalgia, but that's not exactly a good thing.