At the main menu, type "kossuvissy" to enable cheat mode. Then, press [Left] or 
[Right] to select a level. Press one of the following keys during a game to 
activate the corresponding cheat function:

Result - Key
Health | [F1] 
Money | [F2] 
Random | [F3] 
Music select | [F10] 
Drop bomb | [F11] 
Level skip | [F12] 

Level passwords -

Level | Password
10 | DE6782 
20 | 896J3R 
30 | 34UI22 
40 | R3894L 
50 | U890OH 
60 | 9OKLMQ 
70 | IOP4E9 
80 | 256QU1 
90 | 9U380U