I have some serious facts regarding keyboard movements problem (not only for keyboard movements).
I used to handle RPG Maker VX Ace. Yeah, this game engine is pretty neat and also really useful for the person who didn't know anything about developing games, script, etc.
Although the title of engine is 'RPG Maker', but you can make various adventure game with this engine such as 'Dreaming Mary
' and most famous one for current news is probably LISA series. http://www.lisatherpg.com/
Yes, LISA is RPG game but... you can adventure it. Just saying.
Yeah, mostly it is side scroll adventure games but there are also top view adventure games. You can just make games without RPG element if you want.
The only problem for this engine is lack of support for high resolution and lack of mouse device support (you can do it by script someone made but not stable as Visionare Studio) and lack of export option to other platforms.
Now the problem is it's next build named RPG MAKER MV will be emerged on this Winter. http://gematsu.com/2015/08/rpg-maker-mv-first-details-traile...
It supports Mouse control (it means it can also fully support keyboard control already) and support multi platform exportation such as Mac and Linux export (of course ios and apk and even for HTML!) and high resolution up to 1920 x 1080 (not verified yet but I found this one from forum.
Q: Can you go higher than the stated 816x624 resolution?
A: Higher Definition and Resolution is supported through plug-ins. A resolution of 1920x1080 has been tested.)
This engine also handles global sound system already if you don't know. Yes, without script.
RPG MAKER VX Ace can be bought in Steam and MV will be released on Steam as well although still Visionaire Studio doesn't have its own section. And RPG Maker has some histories and really has bigger forum than Visionaire Studio.
Now there are people who want to make adventure games. Which one they will select? The game engine has everything or has lack of things?
I'll mention it again. It will have mouse support. Point and Click games made by this engine will be emerged.
Gladly it's more expensive than Visionaire Studio (Indie Developer version). But it doesn't vary the licenses.
Visionaire Studio should survive from its challenge, seriously. I handled RPG Maker but it doesn't support making interface and complicated inventory system that VS has (it can be supported by using someone's script but I should pay them individually). VS is still better than RPG Maker VX Ace to make adventure games (with higher resolution I really like it) yet but the devs should do some magic before MV will... you know what I'm talking.