How to check whether element has some [style] attribute or not in Selenium IDE testcase?

So, my test has the following command-target-value:

store attribute
id=loadGameButton
*visible*

Trying to find id=loadGameButton... Failed:16:58:58

Implicit Wait timed out after 30000ms

I tried this How to check if a style has been applied in Selenium IDE And this Selenium IDE cannot find ID

store attribute
css=#loadGameButton@style
*inline*

store attribute
css=[id='loadGameButton']
*inline*

but doesn't work either: it always returns OK without correspondence to what I am trying to check.

https://github.com/Areso/1255-burgomaster/tree/master/selenium-ide