I refuse to believe that any piece of art was made by DVD is there's no wacky workbench statue in sight Jokes aside looks pretty good actually!
What do you mean by "looking way better"? If you just want to redraw the sprites, any drawing software should be good, I think. Medibang is pretty complete and free, you could start with that.
Looks like whatever program you're using adds some nasty gif compression. A program like GraphicsGale should be able to save as gif without that mess.
Hey guys wanna see my first custom map from jj3d alpha demo? Wanna try to test this map? Also it's very hard to get download link because game was never finished in late 90's. http://www.mediafire.com/file/w5pz1auh3i6j584/EXP1.unr/file http://www.mediafire.com/file/ovxt12v64pot0eq/EXP2.unr/file http://www.mediafire.com/file/6fgkqcsqa07t6op/EXP3.unr/file http://www.mediafire.com/file/6fraga756sfjqlk/EXP4.unr/file http://www.mediafire.com/file/7ni2g1lortjg8hx/Room1.unr/file http://www.mediafire.com/file/70oyegmwqacrd7m/CaveRoom.unr/file http://www.mediafire.com/file/jzi8p275t4q0hhl/Jazz3.rar/file or the other one http://www.mediafire.com/file/yd9xfk56jovwd93/Jazz224.zip/file You can patch(manually and unofficially,freeware/open source) this game too if you want. http://www.mediafire.com/file/o051t3tv40w3bau/JJ3DPatch_1.3c.zip/file Made by user JazzGruff aka CloverGruff. I also want to leave you some tutorials in case if you could be interested to make your own jj3d alpha demo custom maps or any PC game related and powered by unreal engine 1&2. http://www.mediafire.com/file/t1r74j6vjijekgf/The_Complete_Unreal_Ed_Reference_Guide.pdf/file http://www.mediafire.com/file/3v7a0svx73uis47/UnrealEdReference.pdf/file and more https://www.oldunreal.com/editing.html