played this,there is an introductory level that wasn't present in the original where you have to stop the beagle boys that is pretty short and serve as a tutorial,there is easy,medium and hard... you start with 3 hearts and if you play on medium you have 3 lives per stage and each hit takes a whole heart,playing on easy make you lose half an heart per hit,gives you infinite lives,reveal the whole map right at the start of the game and put checkpoint everywhere (can you spell babby mode?) there is usualy a hidden heart in each stage so i guess near the end of the game you can take a shitload of hits even on medium,i played the moon level (since everybody is like OMG MOON LEVEL) and a friend played the african mine level (on easy) the moon level has you going around the alien ship,finding part of the gizmoduck suit and the african mine level is mostly about dodging rocks that chase you
it's allright,i wouldn't say i was bored but it didn't impress me either,i guess unexcited would be the best adjective i could use... the bosses usualy have a single attack,then you hit them once or thrice and they go berserk where they start using a second attack which is pretty easy to dodge because you know it's coming,then they calm down and you get to do it again until they die,the moon boss berserk attack is so easy to dodge that all you have to do is standing still on a single point

the best part of the game are the sprites,the african mines level has some carnivorous plant and everytime you fall into one you get to see scrooge punching the shit out of the plant while the plant bites him,it's really the most amusing thing in the game... if you somehow watched the show as a kid (i have) it's also nice to remember and see all of the older minor character like gyro or fenton
oh they have also added a function to all the diamond and gold you collect,you now use it to buy artwork,at first you can only buy detailed version of the in-game sprite but as you buy more stuff you unlock concept art and even frames from the original show