One critique for the powerup system: if it had a UI or text popup "+Power" or "-Speed" whenever you press a button, it would help player memorize the buttons faster and be more intuitive. I know it's only 6 buttons to memorize but it's hard to immediately remember everything before you start playing with zero context, so something in the gameplay to help is always welcomed as a new player
Only other note was maybe adding a visible solid barrier for the top and bottom -- the bomb doesn't actually bounce at the screen's edge -- it bounces like 20 pixels from the edge so it actually threw me off a few times not being able to predict the bounce since it's an invisible barrier
My strategy was mostly to increase bomb speed but I think I should have gone full damage instead!! Getting the win was sastisfying though cus it was actually pretty challenging! Great job