GOOD!!
I really liked it! But there are some things ... 1st, there's not upper-left diagonal movement and then, as soon as the sea-boss is roaming around, you can buy all the upgrades ... you know, a 2k a piece is an easy way to buy shadow blade ... and with it, this boss take about 30 secs ... and with the booster, you can actually hunt it! :D Maybe a maximum number of times you can kill it would be better, cause I only have 22 stars and all the upgrades ... and I didnt even went farther the 1st 4 stages ;)