1,200 levels and hundreds of hidden bonuses in Bouapha's greatest adventure! · By Hamumu, SpaceManiac
All I rememeber I was 7 in a library on a very old PC, and had to collect red hammers x) I think it could have been some really early version of
Dr. Lunatic
I think Dr. L came out in 2000, but that is almost 1998. Also, Spooky Castle came out first, and in fact according to the Wiki, it came out in 1998!
https://hamumu.fandom.com/wiki/Spooky_Castle
This is actually a desert island game for me. Thanks Mike :)