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 :)