Absolutely, you can try them out using fun credits and normally without even having to open a casino account directly from Lion Casinos Megaways page.
Players from UK will, however, cannot access these in free play on our website due to the new UKGC rules on age verification.
Any online casinos, such as FunCasino.com will offer them for free to any registered customer, so as a UK player that's your best bet.