Game looks really pretty, the visiuals are very nice.
You do need a lot to happen. Full line of top symbol pays 10x and a non premium full line isnt even money back.
I would like to suggest to remove the special "firework feature" (englightning the firework) in the bottom column if it isnt going to hit anyway.
Its only annoying when you see a super high multi wild and it doesnt even make a line. After like 300-400 spins I landed the bonus and I could see where the potential is.
I think its a slot which would suit bonus buys, but the base game is rather boring, if I have to be honest. Maybe do as some providers do and implement the option for an extra bet which gives you a higher chance of landing the bonus, specially nice for people who live in a country where you can not buy bonuses.