If by "Samsung tablet" you mean one of the original Galaxy Tab Series from 2010/2011:

yes, it won't get any better, unfortunately. Those are too weak for HTML5.

If it's something new like a Galaxy Tab 4, there may be a problem somewhere in your project, a capx would indeed help.

Well, since a major point of doing construct3 was supporting linux and osx.. it probably will be released for it

It's a thread these days..

Hm, I just checked against r208 and it is where it should be:

If it's not there maybe the install is botched?

Do you have the latest release? There was an in-between time when it was removed because the arcade was being remodeled. A few releases back (I believe the last stable) it was reintroduced.

So if you install the latest release, you should see it.

If you are looking to deploy to Linux, you will have to do a 64bit build. Unlike with windows, a vanilla 64bit linux distro typically cannot run 32bit builds out of the box, they need to basically post-install all the 32bit system libraries, which is undesireable for just one game.

*Edit: I overlooked the "Steam" bit of your posting. It may be less of a problem with steam.

You have to be careful to not compare apples to oranges.. general statements about performance are hard to make, it depends a lot on the specific use case, the actual content and whether or not that content is optimized for the device it's running on (with all that this implies).

If you are doing a low res, retro pixel game you may want to set the "Sampling" parameter of your project settings from "linear" (which is the default) to "point". Then the sprite should appear crisp.

Have not tried it myself, but that's expected from an alpha - they are not really meant to be exposed to "end customers" (no offense intended), nor are they feature complete.

Run it with bootcamp or parallels, and accept the limitations that come with that, or wait for C3, which is rumored to be cross-platform.

While I can't comment on Lager, a lot of editor related glitch issues come from outdated graphics drivers. So before you tear your whole project and system apart, you might want to check, if you have the latest stable driver for your configuration.

There are a few ad providers who explicitly allow watching ads for ingame-currency, one of them is vungle, for example ( https://vungle.com/ ).

Unfortunately they do have only native SDKs, not for HTML5.. so as far as I know there is currently no way to integrate them in a construct2 game (someone correct me if I'm wrong, but I have not found any).