Soon, and I mean soon, the web player plugin will not be supported by default through the popular web browsers. I experienced today the first of this change. To avoid confusion within the community, here’s how you can fix it 
Most of those active on the forums, at least in General Discussion, should already be aware of it. We have threads going back as far as 2013 with the information and a post from back in November giving the temporary workaround for Chrome.
For Chrome, browse to chrome://flags/#enable-npapi in and click enable.
For Firefox, browse to about:config and set dom.ipc.plugins.sandbox.default to true.
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Hasn’t worked in Chrome for me for quite some time. I’ve been using Firefox / directing visitors to use firefox until I can get WebGL to behave properly.
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Kongregate and Facebook are also taking this approach.
Didnt work
That’s odd. The Firefox solution has always worked for me. IE can be used as a last resort I you are desperate. 
I tried to play your boat game in chrome but the input didnt seem to work
WebGL and Knogregate currently don’t play nice together. To get the input working in Pond Wars you have to click just below the game in the white area to give the game focus. For some reason clicking on the game itself doesn’t provide focus.
Or you can download the executable from my blog.