Springy Thingy was the very first version of Vertigo - so old that all records but Andrew Gowers personal account of making it have been lost! And that is very little too! The only time it has ever been publicly mentioned was in the Andrew Gower Q&A on the official RuneScape forums. This read (he was listing his previous games at the time):
[..]then did the forerunner to verigo which was called 'springy thingy'..
This was then later remade into Parallax Painter.